Update upstream source from tag 'upstream/2.0.0'

Update to upstream version '2.0.0'
with Debian dir 79d168e267a2c1a4fccee991712d1b9eb825f67e

40 files changed, 2199 insertions, 2371 deletions

diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index 71d0450..0000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,78 +0,0 @@
-version: '{branch}-{build}'
-build: off
-environment:
-  matrix:
-    - TOXENV: check
-      TOXPYTHON: C:\Python36\python.exe
-      PYTHON_HOME: C:\Python36
-      PYTHON_VERSION: '3.6'
-      PYTHON_ARCH: '32'
-    - TOXENV: py27,codecov
-      TOXPYTHON: C:\Python27\python.exe
-      PYTHON_HOME: C:\Python27
-      PYTHON_VERSION: '2.7'
-      PYTHON_ARCH: '32'
-    - TOXENV: py27,codecov
-      TOXPYTHON: C:\Python27-x64\python.exe
-      PYTHON_HOME: C:\Python27-x64
-      PYTHON_VERSION: '2.7'
-      PYTHON_ARCH: '64'
-      WINDOWS_SDK_VERSION: v7.0
-    - TOXENV: py35,codecov
-      TOXPYTHON: C:\Python35\python.exe
-      PYTHON_HOME: C:\Python35
-      PYTHON_VERSION: '3.5'
-      PYTHON_ARCH: '32'
-    - TOXENV: py35,codecov
-      TOXPYTHON: C:\Python35-x64\python.exe
-      PYTHON_HOME: C:\Python35-x64
-      PYTHON_VERSION: '3.5'
-      PYTHON_ARCH: '64'
-    - TOXENV: py36,codecov
-      TOXPYTHON: C:\Python36\python.exe
-      PYTHON_HOME: C:\Python36
-      PYTHON_VERSION: '3.6'
-      PYTHON_ARCH: '32'
-    - TOXENV: py36,codecov
-      TOXPYTHON: C:\Python36-x64\python.exe
-      PYTHON_HOME: C:\Python36-x64
-      PYTHON_VERSION: '3.6'
-      PYTHON_ARCH: '64'
-    - TOXENV: py37,codecov
-      TOXPYTHON: C:\Python37\python.exe
-      PYTHON_HOME: C:\Python37
-      PYTHON_VERSION: '3.7'
-      PYTHON_ARCH: '32'
-    - TOXENV: py37,codecov
-      TOXPYTHON: C:\Python37-x64\python.exe
-      PYTHON_HOME: C:\Python37-x64
-      PYTHON_VERSION: '3.7'
-      PYTHON_ARCH: '64'
-    - TOXENV: py38,codecov
-      TOXPYTHON: C:\Python38\python.exe
-      PYTHON_HOME: C:\Python38
-      PYTHON_VERSION: '3.8'
-      PYTHON_ARCH: '32'
-    - TOXENV: py38,codecov
-      TOXPYTHON: C:\Python38-x64\python.exe
-      PYTHON_HOME: C:\Python38-x64
-      PYTHON_VERSION: '3.8'
-      PYTHON_ARCH: '64'
-init:
-  - ps: echo $env:TOXENV
-  - ps: ls C:\Python*
-install:
-  - '%PYTHON_HOME%\python -mpip install --progress-bar=off tox -rci/requirements.txt'
-  - '%PYTHON_HOME%\Scripts\virtualenv --version'
-  - '%PYTHON_HOME%\Scripts\easy_install --version'
-  - '%PYTHON_HOME%\Scripts\pip --version'
-  - '%PYTHON_HOME%\Scripts\tox --version'
-test_script:
-  - cmd /E:ON /V:ON /C .\ci\appveyor-with-compiler.cmd %PYTHON_HOME%\Scripts\tox
-on_failure:
-  - ps: dir "env:"
-  - ps: get-content .tox\*\log\*
-
-### To enable remote debugging uncomment this (also, see: http://www.appveyor.com/docs/how-to/rdp-to-build-worker):
-# on_finish:
-#   - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 1d8622c..09d7051 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.7.0
+current_version = 2.0.0
 commit = True
 tag = True
 
@@ -7,9 +7,13 @@ tag = True
 search = version='{current_version}'
 replace = version='{new_version}'
 
-[bumpversion:file:README.rst]
-search = v{current_version}.
-replace = v{new_version}.
+[bumpversion:file (badge):README.rst]
+search = /v{current_version}.svg
+replace = /v{new_version}.svg
+
+[bumpversion:file (link):README.rst]
+search = /v{current_version}...master
+replace = /v{new_version}...master
 
 [bumpversion:file:docs/conf.py]
 search = version = release = '{current_version}'
@@ -19,3 +23,6 @@ replace = version = release = '{new_version}'
 search = __version__ = '{current_version}'
 replace = __version__ = '{new_version}'
 
+[bumpversion:file:.cookiecutterrc]
+search = version: {current_version}
+replace = version: {new_version}
diff --git a/.cookiecutterrc b/.cookiecutterrc
index 1836a3d..5fea57e 100644
--- a/.cookiecutterrc
+++ b/.cookiecutterrc
@@ -1,52 +1,47 @@
 # Generated by cookiepatcher, a small shim around cookiecutter (pip install cookiepatcher)
 
-cookiecutter:
-    full_name: Ionel Cristian Mărieș
+default_context:
+    allow_tests_inside_package: 'no'
+    c_extension_function: '-'
+    c_extension_module: '-'
+    c_extension_optional: 'no'
+    c_extension_support: 'no'
+    codacy: 'no'
+    codacy_projectid: '-'
+    codeclimate: 'no'
+    codecov: 'yes'
+    command_line_interface: 'no'
+    command_line_interface_bin_name: '-'
+    coveralls: 'no'
+    distribution_name: tblib
     email: contact@ionelmc.ro
-    website: https://blog.ionelmc.ro/
+    formatter_quote_style: single
+    full_name: Ionel Cristian Mărieș
+    github_actions: 'yes'
+    github_actions_osx: 'yes'
+    github_actions_windows: 'yes'
+    license: BSD 2-Clause License
+    package_name: tblib
+    pre_commit: 'yes'
     project_name: tblib
-    repo_name: python-tblib
+    project_short_description: Traceback serialization library.
+    pypi_badge: 'yes'
+    pypi_disable_upload: 'no'
+    release_date: '2020-07-24'
     repo_hosting: github.com
     repo_hosting_domain: github.com
+    repo_main_branch: master
+    repo_name: python-tblib
     repo_username: ionelmc
-    package_name: tblib
-    distribution_name: tblib
-    project_short_description: Traceback serialization library.
-    release_date: '2020-03-07'
-    year_from: '2013'
-    year_to: '2'
-    version: 1.6.0
-    license: BSD 2-Clause License
-    c_extension_support: no
-    c_extension_optional: no
-    c_extension_module: '-'
-    c_extension_function: '-'
-    c_extension_test_pypi: no
-    c_extension_test_pypi_username: '-'
-    test_matrix_configurator: no
-    test_matrix_separate_coverage: no
-    test_runner: pytest
-    setup_py_uses_test_runner: no
-    setup_py_uses_setuptools_scm: no
-    pypi_badge: yes
-    pypi_disable_upload: no
-    allow_tests_inside_package: no
-    linter: flake8
-    command_line_interface: no
-    command_line_interface_bin_name: '-'
-    coveralls: no
-    coveralls_token: '-'
-    codecov: yes
-    landscape: no
-    scrutinizer: no
-    codacy: no
-    codacy_projectid: '-'
-    codeclimate: no
-    sphinx_docs: yes
-    sphinx_theme: sphinx-py3doc-enhanced-theme
-    sphinx_doctest: no
+    scrutinizer: 'no'
+    setup_py_uses_setuptools_scm: 'no'
+    sphinx_docs: 'yes'
     sphinx_docs_hosting: https://python-tblib.readthedocs.io/
-    travis: yes
-    travis_osx: no
-    appveyor: yes
-    requiresio: yes
+    sphinx_doctest: 'no'
+    sphinx_theme: sphinx-py3doc-enhanced-theme
+    test_matrix_separate_coverage: 'no'
+    version: 2.0.0
+    version_manager: bump2version
+    website: https://blog.ionelmc.ro/
+    year_from: '2013'
+    year_to: '2022'
diff --git a/.editorconfig b/.editorconfig
index 6eb7567..586c736 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -2,12 +2,19 @@
 root = true
 
 [*]
+# Use Unix-style newlines for most files (except Windows files, see below).
 end_of_line = lf
 trim_trailing_whitespace = true
-insert_final_newline = true
 indent_style = space
+insert_final_newline = true
 indent_size = 4
 charset = utf-8
 
 [*.{bat,cmd,ps1}]
 end_of_line = crlf
+
+[*.{yml,yaml}]
+indent_size = 2
+
+[*.tsv]
+indent_style = tab
diff --git a/.github/workflows/github-actions.yml b/.github/workflows/github-actions.yml
new file mode 100644
index 0000000..51985bc
--- /dev/null
+++ b/.github/workflows/github-actions.yml
@@ -0,0 +1,185 @@
+name: build
+on: [push, pull_request]
+jobs:
+  test:
+    name: ${{ matrix.name }}
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: 'check'
+            python: '3.11'
+            toxpython: 'python3.11'
+            tox_env: 'check'
+            os: 'ubuntu-latest'
+          - name: 'docs'
+            python: '3.11'
+            toxpython: 'python3.11'
+            tox_env: 'docs'
+            os: 'ubuntu-latest'
+          - name: 'py37 (ubuntu)'
+            python: '3.7'
+            toxpython: 'python3.7'
+            python_arch: 'x64'
+            tox_env: 'py37'
+            os: 'ubuntu-latest'
+          - name: 'py37 (windows)'
+            python: '3.7'
+            toxpython: 'python3.7'
+            python_arch: 'x64'
+            tox_env: 'py37'
+            os: 'windows-latest'
+          - name: 'py37 (macos)'
+            python: '3.7'
+            toxpython: 'python3.7'
+            python_arch: 'x64'
+            tox_env: 'py37'
+            os: 'macos-latest'
+          - name: 'py38 (ubuntu)'
+            python: '3.8'
+            toxpython: 'python3.8'
+            python_arch: 'x64'
+            tox_env: 'py38'
+            os: 'ubuntu-latest'
+          - name: 'py38 (windows)'
+            python: '3.8'
+            toxpython: 'python3.8'
+            python_arch: 'x64'
+            tox_env: 'py38'
+            os: 'windows-latest'
+          - name: 'py38 (macos)'
+            python: '3.8'
+            toxpython: 'python3.8'
+            python_arch: 'x64'
+            tox_env: 'py38'
+            os: 'macos-latest'
+          - name: 'py39 (ubuntu)'
+            python: '3.9'
+            toxpython: 'python3.9'
+            python_arch: 'x64'
+            tox_env: 'py39'
+            os: 'ubuntu-latest'
+          - name: 'py39 (windows)'
+            python: '3.9'
+            toxpython: 'python3.9'
+            python_arch: 'x64'
+            tox_env: 'py39'
+            os: 'windows-latest'
+          - name: 'py39 (macos)'
+            python: '3.9'
+            toxpython: 'python3.9'
+            python_arch: 'x64'
+            tox_env: 'py39'
+            os: 'macos-latest'
+          - name: 'py310 (ubuntu)'
+            python: '3.10'
+            toxpython: 'python3.10'
+            python_arch: 'x64'
+            tox_env: 'py310'
+            os: 'ubuntu-latest'
+          - name: 'py310 (windows)'
+            python: '3.10'
+            toxpython: 'python3.10'
+            python_arch: 'x64'
+            tox_env: 'py310'
+            os: 'windows-latest'
+          - name: 'py310 (macos)'
+            python: '3.10'
+            toxpython: 'python3.10'
+            python_arch: 'x64'
+            tox_env: 'py310'
+            os: 'macos-latest'
+          - name: 'py311 (ubuntu)'
+            python: '3.11'
+            toxpython: 'python3.11'
+            python_arch: 'x64'
+            tox_env: 'py311'
+            os: 'ubuntu-latest'
+          - name: 'py311 (windows)'
+            python: '3.11'
+            toxpython: 'python3.11'
+            python_arch: 'x64'
+            tox_env: 'py311'
+            os: 'windows-latest'
+          - name: 'py311 (macos)'
+            python: '3.11'
+            toxpython: 'python3.11'
+            python_arch: 'x64'
+            tox_env: 'py311'
+            os: 'macos-latest'
+          - name: 'pypy37 (ubuntu)'
+            python: 'pypy-3.7'
+            toxpython: 'pypy3.7'
+            python_arch: 'x64'
+            tox_env: 'pypy37'
+            os: 'ubuntu-latest'
+          - name: 'pypy37 (windows)'
+            python: 'pypy-3.7'
+            toxpython: 'pypy3.7'
+            python_arch: 'x64'
+            tox_env: 'pypy37'
+            os: 'windows-latest'
+          - name: 'pypy37 (macos)'
+            python: 'pypy-3.7'
+            toxpython: 'pypy3.7'
+            python_arch: 'x64'
+            tox_env: 'pypy37'
+            os: 'macos-latest'
+          - name: 'pypy38 (ubuntu)'
+            python: 'pypy-3.8'
+            toxpython: 'pypy3.8'
+            python_arch: 'x64'
+            tox_env: 'pypy38'
+            os: 'ubuntu-latest'
+          - name: 'pypy38 (windows)'
+            python: 'pypy-3.8'
+            toxpython: 'pypy3.8'
+            python_arch: 'x64'
+            tox_env: 'pypy38'
+            os: 'windows-latest'
+          - name: 'pypy38 (macos)'
+            python: 'pypy-3.8'
+            toxpython: 'pypy3.8'
+            python_arch: 'x64'
+            tox_env: 'pypy38'
+            os: 'macos-latest'
+          - name: 'pypy39 (ubuntu)'
+            python: 'pypy-3.9'
+            toxpython: 'pypy3.9'
+            python_arch: 'x64'
+            tox_env: 'pypy39'
+            os: 'ubuntu-latest'
+          - name: 'pypy39 (windows)'
+            python: 'pypy-3.9'
+            toxpython: 'pypy3.9'
+            python_arch: 'x64'
+            tox_env: 'pypy39'
+            os: 'windows-latest'
+          - name: 'pypy39 (macos)'
+            python: 'pypy-3.9'
+            toxpython: 'pypy3.9'
+            python_arch: 'x64'
+            tox_env: 'pypy39'
+            os: 'macos-latest'
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python }}
+        architecture: ${{ matrix.python_arch }}
+    - name: install dependencies
+      run: |
+        python -mpip install --progress-bar=off -r ci/requirements.txt
+        virtualenv --version
+        pip --version
+        tox --version
+        pip list --format=freeze
+    - name: test
+      env:
+        TOXPYTHON: '${{ matrix.toxpython }}'
+      run: >
+        tox -e ${{ matrix.tox_env }} -v
diff --git a/.gitignore b/.gitignore
index dfe5838..77973dd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,51 +1,67 @@
 *.py[cod]
 __pycache__
 
+# Temp files
+.*.sw[po]
+*~
+*.bak
+.DS_Store
+
 # C extensions
 *.so
 
-# Packages
+# Build and package files
 *.egg
 *.egg-info
-dist
-build
-eggs
+.bootstrap
+.build
+.cache
 .eggs
-parts
+.env
+.installed.cfg
+.ve
 bin
-var
-sdist
-wheelhouse
+build
 develop-eggs
-.installed.cfg
+dist
+eggs
 lib
 lib64
-venv*/
-pyvenv*/
+parts
 pip-wheel-metadata/
+pyvenv*/
+sdist
+var
+venv*/
+wheelhouse
 
 # Installer logs
 pip-log.txt
 
 # Unit test / coverage reports
+.benchmarks
 .coverage
-.tox
 .coverage.*
+.pytest
 .pytest_cache/
-nosetests.xml
+.tox
 coverage.xml
 htmlcov
+nosetests.xml
 
 # Translations
 *.mo
 
-# Mr Developer
+# Buildout
 .mr.developer.cfg
-.project
-.pydevproject
-.idea
+
+# IDE project files
 *.iml
 *.komodoproject
+.idea
+.project
+.pydevproject
+.vscode
 
 # Complexity
 output/*.html
@@ -54,18 +70,5 @@ output/*/index.html
 # Sphinx
 docs/_build
 
-.DS_Store
-*~
-.*.sw[po]
-.build
-.ve
-.env
-.cache
-.pytest
-.benchmarks
-.bootstrap
-.appveyor.token
-*.bak
-
 # Mypy Cache
 .mypy_cache/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..1831efd
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,22 @@
+# To install the git pre-commit hooks run:
+#   pre-commit install --install-hooks
+# To update the versions:
+#   pre-commit autoupdate
+exclude: '^(\.tox|ci/templates|\.bumpversion\.cfg|tests/bad.*.py)(/|$)'
+# Note the order is intentional to avoid multiple passes of the hooks
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.0.274
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix, --show-fixes]
+  - repo: https://github.com/psf/black
+    rev: 23.3.0
+    hooks:
+      - id: black
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: debug-statements
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0e947cb..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,56 +0,0 @@
-language: python
-dist: xenial
-cache: false
-env:
-  global:
-    - LD_PRELOAD=/lib/x86_64-linux-gnu/libSegFault.so
-    - SEGFAULT_SIGNALS=all
-matrix:
-  include:
-    - python: '3.6'
-      env:
-        - TOXENV=check
-    - python: '3.6'
-      env:
-        - TOXENV=docs
-    - env:
-        - TOXENV=py27,codecov
-      python: '2.7'
-    - env:
-        - TOXENV=py35,codecov
-      python: '3.5'
-    - env:
-        - TOXENV=py36,codecov
-      python: '3.6'
-    - env:
-        - TOXENV=py37,codecov
-      python: '3.7'
-    - env:
-        - TOXENV=py38,codecov
-      python: '3.8'
-    - env:
-        - TOXENV=pypy,codecov
-      python: 'pypy'
-    - env:
-        - TOXENV=pypy3,codecov
-        - TOXPYTHON=pypy3
-      python: 'pypy3'
-before_install:
-  - python --version
-  - uname -a
-  - lsb_release -a || true
-install:
-  - python -mpip install --progress-bar=off tox -rci/requirements.txt
-  - virtualenv --version
-  - easy_install --version
-  - pip --version
-  - tox --version
-script:
-  - tox -v
-after_failure:
-  - more .tox/log/* | cat
-  - more .tox/*/log/* | cat
-notifications:
-  email:
-    on_success: never
-    on_failure: always
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index c3c5aeb..9a34ad5 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,12 @@
 Changelog
 =========
 
+2.0.0 (2023-06-22)
+~~~~~~~~~~~~~~~~~~
+
+* Removed support for legacy Pythons (2.7 and 3.6) and added Python 3.11 in the test grid.
+* Some cleanups and refactors (mostly from ruff).
+
 1.7.0 (2020-07-24)
 ~~~~~~~~~~~~~~~~~~
 
@@ -36,7 +42,7 @@ Changelog
 
 * Add support for PyPy3.5-5.7.1-beta. Previously ``AttributeError:
   'Frame' object has no attribute 'clear'``  could be raised. See PyPy
-  issue `#2532 <https://bitbucket.org/pypy/pypy/issues/2532/pypy3-attributeerror-frame-object-has-no>`_.
+  issue `#2532 <https://foss.heptapod.net/pypy/pypy/-/issues/2532>`_.
 
 1.3.1 (2017-03-27)
 ~~~~~~~~~~~~~~~~~~
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 1d6bfc5..a89ed3a 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -41,7 +41,7 @@ To set up `python-tblib` for local development:
    (look for the "Fork" button).
 2. Clone your fork locally::
 
-    git clone git@github.com:ionelmc/python-tblib.git
+    git clone git@github.com:YOURGITHUBNAME/python-tblib.git
 
 3. Create a branch for local development::
 
@@ -68,15 +68,12 @@ If you need some code review or feedback while you're developing the code just m
 
 For merging, you should:
 
-1. Include passing tests (run ``tox``) [1]_.
+1. Include passing tests (run ``tox``).
 2. Update documentation when there's new API, functionality etc.
 3. Add a note to ``CHANGELOG.rst`` about the changes.
 4. Add yourself to ``AUTHORS.rst``.
 
-.. [1] If you don't have all the necessary python versions available locally you can rely on Travis - it will
-       `run the tests <https://travis-ci.org/ionelmc/python-tblib/pull_requests>`_ for each change you add in the pull request.
 
-       It will be slower though ...
 
 Tips
 ----
@@ -85,6 +82,6 @@ To run a subset of tests::
 
     tox -e envname -- pytest -k test_myfeature
 
-To run all the test environments in *parallel* (you need to ``pip install detox``)::
+To run all the test environments in *parallel*::
 
-    detox
+    tox -p auto
diff --git a/LICENSE b/LICENSE
index 7dac254..151345b 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 BSD 2-Clause License
 
-Copyright (c) 2013-2020, Ionel Cristian Mărieș. All rights reserved.
+Copyright (c) 2013-2022, Ionel Cristian Mărieș. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 following conditions are met:
diff --git a/MANIFEST.in b/MANIFEST.in
index 8b9e93d..d0dac9c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,9 +4,14 @@ graft ci
 graft tests
 
 include .bumpversion.cfg
-include .coveragerc
 include .cookiecutterrc
+include .coveragerc
 include .editorconfig
+include .github/workflows/github-actions.yml
+include .pre-commit-config.yaml
+include .readthedocs.yml
+include pytest.ini
+include tox.ini
 
 include AUTHORS.rst
 include CHANGELOG.rst
@@ -14,6 +19,4 @@ include CONTRIBUTING.rst
 include LICENSE
 include README.rst
 
-include tox.ini .travis.yml .appveyor.yml .readthedocs.yml
-
 global-exclude *.py[cod] __pycache__/* *.so *.dylib
diff --git a/PKG-INFO b/PKG-INFO
index 122805d..b15d380 100644
--- a/PKG-INFO
+++ b/PKG-INFO
@@ -1,6 +1,6 @@
-Metadata-Version: 1.2
+Metadata-Version: 2.1
 Name: tblib
-Version: 1.7.0
+Version: 2.0.0
 Summary: Traceback serialization library.
 Home-page: https://github.com/ionelmc/python-tblib
 Author: Ionel Cristian Mărieș
@@ -9,738 +9,7 @@ License: BSD-2-Clause
 Project-URL: Documentation, https://python-tblib.readthedocs.io/
 Project-URL: Changelog, https://python-tblib.readthedocs.io/en/latest/changelog.html
 Project-URL: Issue Tracker, https://github.com/ionelmc/python-tblib/issues
-Description: ========
-        Overview
-        ========
-        
-        
-        
-        Serialization library for Exceptions and Tracebacks.
-        
-        * Free software: BSD license
-        
-        It allows you to:
-        
-        * `Pickle <https://docs.python.org/3/library/pickle.html>`_ tracebacks and raise exceptions
-          with pickled tracebacks in different processes. This allows better error handling when running
-          code over multiple processes (imagine multiprocessing, billiard, futures, celery etc).
-        * Create traceback objects from strings (the ``from_string`` method). *No pickling is used*.
-        * Serialize tracebacks to/from plain dicts (the ``from_dict`` and ``to_dict`` methods). *No pickling is used*.
-        * Raise the tracebacks created from the aforementioned sources.
-        * Pickle an Exception together with its traceback and exception chain
-          (``raise ... from ...``) *(Python 3 only)*
-        
-        **Again, note that using the pickle support is completely optional. You are solely responsible for
-        security problems should you decide to use the pickle support.**
-        
-        Installation
-        ============
-        
-        ::
-        
-            pip install tblib
-        
-        Documentation
-        =============
-        
-        .. contents::
-           :local:
-        
-        Pickling tracebacks
-        ~~~~~~~~~~~~~~~~~~~
-        
-        **Note**: The traceback objects that come out are stripped of some attributes (like variables). But you'll be able to raise exceptions with
-        those tracebacks or print them - that should cover 99% of the usecases.
-        
-        ::
-        
-            >>> from tblib import pickling_support
-            >>> pickling_support.install()
-            >>> import pickle, sys
-            >>> def inner_0():
-            ...     raise Exception('fail')
-            ...
-            >>> def inner_1():
-            ...     inner_0()
-            ...
-            >>> def inner_2():
-            ...     inner_1()
-            ...
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     s1 = pickle.dumps(sys.exc_info())
-            ...
-            >>> len(s1) > 1
-            True
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     s2 = pickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
-            ...
-            >>> len(s2) > 1
-            True
-        
-            >>> try:
-            ...     import cPickle
-            ... except ImportError:
-            ...     import pickle as cPickle
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     s3 = cPickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
-            ...
-            >>> len(s3) > 1
-            True
-        
-        Unpickling tracebacks
-        ~~~~~~~~~~~~~~~~~~~~~
-        
-        ::
-        
-            >>> pickle.loads(s1)
-            (<...Exception'>, Exception('fail'...), <traceback object at ...>)
-        
-            >>> pickle.loads(s2)
-            (<...Exception'>, Exception('fail'...), <traceback object at ...>)
-        
-            >>> pickle.loads(s3)
-            (<...Exception'>, Exception('fail'...), <traceback object at ...>)
-        
-        Raising
-        ~~~~~~~
-        
-        ::
-        
-            >>> from six import reraise
-            >>> reraise(*pickle.loads(s1))
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[14]>", line 1, in <module>
-                reraise(*pickle.loads(s2))
-              File "<doctest README.rst[8]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-            >>> reraise(*pickle.loads(s2))
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[14]>", line 1, in <module>
-                reraise(*pickle.loads(s2))
-              File "<doctest README.rst[8]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-            >>> reraise(*pickle.loads(s3))
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[14]>", line 1, in <module>
-                reraise(*pickle.loads(s2))
-              File "<doctest README.rst[8]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        Pickling Exceptions together with their traceback and chain (Python 3 only)
-        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-        
-        ::
-        
-            >>> try:  # doctest: +SKIP
-            ...     try:
-            ...         1 / 0
-            ...     except Exception as e:
-            ...         raise Exception("foo") from e
-            ... except Exception as e:
-            ...     s = pickle.dumps(e)
-            >>> raise pickle.loads(s)  # doctest: +SKIP
-            Traceback (most recent call last):
-              File "<doctest README.rst[16]>", line 3, in <module>
-                1 / 0
-            ZeroDivisionError: division by zero
-        
-            The above exception was the direct cause of the following exception:
-        
-            Traceback (most recent call last):
-              File "<doctest README.rst[17]>", line 1, in <module>
-                raise pickle.loads(s)
-              File "<doctest README.rst[16]>", line 5, in <module>
-                raise Exception("foo") from e
-            Exception: foo
-        
-        BaseException subclasses defined after calling ``pickling_support.install()`` will
-        **not** retain their traceback and exception chain pickling.
-        To cover custom Exceptions, there are three options:
-        
-        1. Use ``@pickling_support.install`` as a decorator for each custom Exception
-        
-            .. code-block:: python
-        
-                >>> from tblib import pickling_support
-                >>> # Declare all imports of your package's dependencies
-                >>> import numpy  # doctest: +SKIP
-        
-                >>> pickling_support.install()  # install for all modules imported so far
-        
-                >>> @pickling_support.install
-                ... class CustomError(Exception):
-                ...     pass
-        
-           Eventual subclasses of ``CustomError`` will need to be decorated again.
-        
-        2. Invoke ``pickling_support.install()`` after all modules have been imported and all
-           Exception subclasses have been declared
-        
-            .. code-block:: python
-        
-                >>> # Declare all imports of your package's dependencies
-                >>> import numpy  # doctest: +SKIP
-                >>> from tblib import pickling_support
-        
-                >>> # Declare your own custom Exceptions
-                >>> class CustomError(Exception):
-                ...     pass
-        
-                >>> # Finally, install tblib
-                >>> pickling_support.install()
-        
-        3. Selectively install tblib for Exception instances just before they are pickled
-        
-            .. code-block:: python
-        
-               pickling_support.install(<Exception instance>, [Exception instance], ...)
-        
-           The above will install tblib pickling for all listed exceptions as well as any other
-           exceptions in their exception chains.
-        
-           For example, one could write a wrapper to be used with
-           `ProcessPoolExecutor <https://docs.python.org/3/library/concurrent.futures.html>`_,
-           `Dask.distributed <https://distributed.dask.org/>`_, or similar libraries:
-        
-        ::
-        
-            >>> from tblib import pickling_support
-            >>> def wrapper(func, *args, **kwargs):
-            ...     try:
-            ...         return func(*args, **kwargs)
-            ...     except Exception as e:
-            ...         pickling_support.install(e)
-            ...         raise
-        
-        What if we have a local stack, does it show correctly ?
-        -------------------------------------------------------
-        
-        Yes it does::
-        
-            >>> exc_info = pickle.loads(s3)
-            >>> def local_0():
-            ...     reraise(*exc_info)
-            ...
-            >>> def local_1():
-            ...     local_0()
-            ...
-            >>> def local_2():
-            ...     local_1()
-            ...
-            >>> local_2()
-            Traceback (most recent call last):
-              File "...doctest.py", line ..., in __run
-                compileflags, 1) in test.globs
-              File "<doctest README.rst[24]>", line 1, in <module>
-                local_2()
-              File "<doctest README.rst[23]>", line 2, in local_2
-                local_1()
-              File "<doctest README.rst[22]>", line 2, in local_1
-                local_0()
-              File "<doctest README.rst[21]>", line 2, in local_0
-                reraise(*exc_info)
-              File "<doctest README.rst[11]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        It also supports more contrived scenarios
-        -----------------------------------------
-        
-        Like tracebacks with syntax errors::
-        
-            >>> from tblib import Traceback
-            >>> from examples import bad_syntax
-            >>> try:
-            ...     bad_syntax()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[58]>", line 1, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[57]>", line 2, in <module>
-                bad_syntax()
-              File "...tests...examples.py", line 18, in bad_syntax
-                import badsyntax
-              File "...tests...badsyntax.py", line 5
-                is very bad
-                 ^
-            SyntaxError: invalid syntax
-        
-        Or other import failures::
-        
-            >>> from examples import bad_module
-            >>> try:
-            ...     bad_module()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[61]>", line 1, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[60]>", line 2, in <module>
-                bad_module()
-              File "...tests...examples.py", line 23, in bad_module
-                import badmodule
-              File "...tests...badmodule.py", line 3, in <module>
-                raise Exception("boom!")
-            Exception: boom!
-        
-        Or a traceback that's caused by exceeding the recursion limit (here we're
-        forcing the type and value to have consistency across platforms)::
-        
-            >>> def f(): f()
-            >>> try:
-            ...    f()
-            ... except RuntimeError:
-            ...    et, ev, tb = sys.exc_info()
-            ...    tb = Traceback(tb)
-            ...
-            >>> reraise(RuntimeError, RuntimeError("maximum recursion depth exceeded"), tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[32]>", line 1, in f
-                def f(): f()
-              File "<doctest README.rst[32]>", line 1, in f
-                def f(): f()
-              File "<doctest README.rst[32]>", line 1, in f
-                def f(): f()
-              ...
-            RuntimeError: maximum recursion depth exceeded
-        
-        Reference
-        ~~~~~~~~~
-        
-        tblib.Traceback
-        ---------------
-        
-        It is used by the ``pickling_support``. You can use it too if you want more flexibility::
-        
-            >>> from tblib import Traceback
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[21]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[21]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        tblib.Traceback.to_dict
-        ```````````````````````
-        
-        You can use the ``to_dict`` method and the ``from_dict`` classmethod to
-        convert a Traceback into and from a dictionary serializable by the stdlib
-        json.JSONDecoder::
-        
-            >>> import json
-            >>> from pprint import pprint
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...     tb_dict = tb.to_dict()
-            ...     pprint(tb_dict)
-            {'tb_frame': {'f_code': {'co_filename': '<doctest README.rst[...]>',
-                                     'co_name': '<module>'},
-                          'f_globals': {'__name__': '__main__'},
-                          'f_lineno': 5},
-             'tb_lineno': 2,
-             'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
-                                                 'co_name': 'inner_2'},
-                                      'f_globals': {'__name__': '__main__'},
-                                      'f_lineno': 2},
-                         'tb_lineno': 2,
-                         'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
-                                                             'co_name': 'inner_1'},
-                                                  'f_globals': {'__name__': '__main__'},
-                                                  'f_lineno': 2},
-                                     'tb_lineno': 2,
-                                     'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
-                                                                         'co_name': 'inner_0'},
-                                                              'f_globals': {'__name__': '__main__'},
-                                                              'f_lineno': 2},
-                                                 'tb_lineno': 2,
-                                                 'tb_next': None}}}}
-        
-        tblib.Traceback.from_dict
-        `````````````````````````
-        
-        Building on the previous example::
-        
-            >>> tb_json = json.dumps(tb_dict)
-            >>> tb = Traceback.from_dict(json.loads(tb_json))
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[21]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[21]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        tblib.Traceback.from_string
-        ```````````````````````````
-        
-        ::
-        
-            >>> tb = Traceback.from_string("""
-            ... File "skipped.py", line 123, in func_123
-            ... Traceback (most recent call last):
-            ...   File "tests/examples.py", line 2, in func_a
-            ...     func_b()
-            ...   File "tests/examples.py", line 6, in func_b
-            ...     func_c()
-            ...   File "tests/examples.py", line 10, in func_c
-            ...     func_d()
-            ...   File "tests/examples.py", line 14, in func_d
-            ... Doesn't: matter
-            ... """)
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[42]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "...examples.py", line 2, in func_a
-                func_b()
-              File "...examples.py", line 6, in func_b
-                func_c()
-              File "...examples.py", line 10, in func_c
-                func_d()
-              File "...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: fail
-        
-        
-        If you use the ``strict=False`` option then parsing is a bit more lax::
-        
-            >>> tb = Traceback.from_string("""
-            ... File "bogus.py", line 123, in bogus
-            ... Traceback (most recent call last):
-            ...  File "tests/examples.py", line 2, in func_a
-            ...   func_b()
-            ...    File "tests/examples.py", line 6, in func_b
-            ...     func_c()
-            ...    File "tests/examples.py", line 10, in func_c
-            ...   func_d()
-            ...  File "tests/examples.py", line 14, in func_d
-            ... Doesn't: matter
-            ... """, strict=False)
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[42]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "bogus.py", line 123, in bogus
-              File "...examples.py", line 2, in func_a
-                func_b()
-              File "...examples.py", line 6, in func_b
-                func_c()
-              File "...examples.py", line 10, in func_c
-                func_d()
-              File "...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: fail
-        
-        tblib.decorators.return_error
-        -----------------------------
-        
-        ::
-        
-            >>> from tblib.decorators import return_error
-            >>> inner_2r = return_error(inner_2)
-            >>> e = inner_2r()
-            >>> e
-            <tblib.decorators.Error object at ...>
-            >>> e.reraise()
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[26]>", line 1, in <module>
-                e.reraise()
-              File "...tblib...decorators.py", line 19, in reraise
-                reraise(self.exc_type, self.exc_value, self.traceback)
-              File "...tblib...decorators.py", line 25, in return_exceptions_wrapper
-                return func(*args, **kwargs)
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        How's this useful? Imagine you're using multiprocessing like this::
-        
-            # Note that Python 3.4 and later will show the remote traceback (but as a string sadly) so we skip testing this.
-            >>> import traceback
-            >>> from multiprocessing import Pool
-            >>> from examples import func_a
-            >>> pool = Pool()  # doctest: +SKIP
-            >>> try:  # doctest: +SKIP
-            ...     for i in pool.map(func_a, range(5)):
-            ...         print(i)
-            ... except:
-            ...     print(traceback.format_exc())
-            ...
-            Traceback (most recent call last):
-              File "<doctest README.rst[...]>", line 2, in <module>
-                for i in pool.map(func_a, range(5)):
-              File "...multiprocessing...pool.py", line ..., in map
-                ...
-              File "...multiprocessing...pool.py", line ..., in get
-                ...
-            Exception: Guessing time !
-            <BLANKLINE>
-            >>> pool.terminate()  # doctest: +SKIP
-        
-        Not very useful is it? Let's sort this out::
-        
-            >>> from tblib.decorators import apply_with_return_error, Error
-            >>> from itertools import repeat
-            >>> pool = Pool()
-            >>> try:
-            ...     for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
-            ...         if isinstance(i, Error):
-            ...             i.reraise()
-            ...         else:
-            ...             print(i)
-            ... except:
-            ...     print(traceback.format_exc())
-            ...
-            Traceback (most recent call last):
-              File "<doctest README.rst[...]>", line 4, in <module>
-                i.reraise()
-              File "...tblib...decorators.py", line ..., in reraise
-                reraise(self.exc_type, self.exc_value, self.traceback)
-              File "...tblib...decorators.py", line ..., in return_exceptions_wrapper
-                return func(*args, **kwargs)
-              File "...tblib...decorators.py", line ..., in apply_with_return_error
-                return args[0](*args[1:])
-              File "...examples.py", line 2, in func_a
-                func_b()
-              File "...examples.py", line 6, in func_b
-                func_c()
-              File "...examples.py", line 10, in func_c
-                func_d()
-              File "...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: Guessing time !
-            <BLANKLINE>
-            >>> pool.terminate()
-        
-        Much better !
-        
-        What if we have a local call stack ?
-        ````````````````````````````````````
-        
-        ::
-        
-            >>> def local_0():
-            ...     pool = Pool()
-            ...     try:
-            ...         for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
-            ...             if isinstance(i, Error):
-            ...                 i.reraise()
-            ...             else:
-            ...                 print(i)
-            ...     finally:
-            ...         pool.close()
-            ...
-            >>> def local_1():
-            ...     local_0()
-            ...
-            >>> def local_2():
-            ...     local_1()
-            ...
-            >>> try:
-            ...     local_2()
-            ... except:
-            ...     print(traceback.format_exc())
-            Traceback (most recent call last):
-              File "<doctest README.rst[...]>", line 2, in <module>
-                local_2()
-              File "<doctest README.rst[...]>", line 2, in local_2
-                local_1()
-              File "<doctest README.rst[...]>", line 2, in local_1
-                local_0()
-              File "<doctest README.rst[...]>", line 6, in local_0
-                i.reraise()
-              File "...tblib...decorators.py", line 20, in reraise
-                reraise(self.exc_type, self.exc_value, self.traceback)
-              File "...tblib...decorators.py", line 27, in return_exceptions_wrapper
-                return func(*args, **kwargs)
-              File "...tblib...decorators.py", line 47, in apply_with_return_error
-                return args[0](*args[1:])
-              File "...tests...examples.py", line 2, in func_a
-                func_b()
-              File "...tests...examples.py", line 6, in func_b
-                func_c()
-              File "...tests...examples.py", line 10, in func_c
-                func_d()
-              File "...tests...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: Guessing time !
-            <BLANKLINE>
-        
-        Other weird stuff
-        `````````````````
-        
-        Clearing traceback works (Python 3.4 and up)::
-        
-            >>> tb = Traceback.from_string("""
-            ... File "skipped.py", line 123, in func_123
-            ... Traceback (most recent call last):
-            ...   File "tests/examples.py", line 2, in func_a
-            ...     func_b()
-            ...   File "tests/examples.py", line 6, in func_b
-            ...     func_c()
-            ...   File "tests/examples.py", line 10, in func_c
-            ...     func_d()
-            ...   File "tests/examples.py", line 14, in func_d
-            ... Doesn't: matter
-            ... """)
-            >>> import traceback, sys
-            >>> if sys.version_info > (3, 4):
-            ...     traceback.clear_frames(tb)
-        
-        Credits
-        =======
-        
-        * `mitsuhiko/jinja2 <https://github.com/mitsuhiko/jinja2>`_ for figuring a way to create traceback objects.
-        
-        
-        Changelog
-        =========
-        
-        1.7.0 (2020-07-24)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Add more attributes to ``Frame`` and ``Code`` objects for pytest compatibility. Contributed by Ivanq in
-          `#58 <https://github.com/ionelmc/python-tblib/pull/58>`_.
-        
-        1.6.0 (2019-12-07)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * When pickling an Exception, also pickle its traceback and the Exception chain
-          (``raise ... from ...``). Contributed by Guido Imperiale in
-          `#53 <https://github.com/ionelmc/python-tblib/issues/53>`_.
-        
-        1.5.0 (2019-10-23)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added support for Python 3.8. Contributed by Victor Stinner in
-          `#42 <https://github.com/ionelmc/python-tblib/issues/42>`_.
-        * Removed support for end of life Python 3.4.
-        * Few CI improvements and fixes.
-        
-        1.4.0 (2019-05-02)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Removed support for end of life Python 3.3.
-        * Fixed tests for Python 3.7. Contributed by Elliott Sales de Andrade in
-          `#36 <https://github.com/ionelmc/python-tblib/issues/36>`_.
-        * Fixed compatibility issue with Twised (``twisted.python.failure.Failure`` expected a ``co_code`` attribute).
-        
-        1.3.2 (2017-04-09)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Add support for PyPy3.5-5.7.1-beta. Previously ``AttributeError:
-          'Frame' object has no attribute 'clear'``  could be raised. See PyPy
-          issue `#2532 <https://bitbucket.org/pypy/pypy/issues/2532/pypy3-attributeerror-frame-object-has-no>`_.
-        
-        1.3.1 (2017-03-27)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Fixed handling for tracebacks due to exceeding the recursion limit.
-          Fixes `#15 <https://github.com/ionelmc/python-tblib/issues/15>`_.
-        
-        1.3.0 (2016-03-08)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added ``Traceback.from_string``.
-        
-        1.2.0 (2015-12-18)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Fixed handling for tracebacks from generators and other internal improvements
-          and optimizations. Contributed by DRayX in `#10 <https://github.com/ionelmc/python-tblib/issues/10>`_
-          and `#11 <https://github.com/ionelmc/python-tblib/pull/11>`_.
-        
-        1.1.0 (2015-07-27)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added support for Python 2.6. Contributed by Arcadiy Ivanov in
-          `#8 <https://github.com/ionelmc/python-tblib/pull/8>`_.
-        
-        1.0.0 (2015-03-30)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added ``to_dict`` method and ``from_dict`` classmethod on Tracebacks.
-          Contributed by beckjake in `#5 <https://github.com/ionelmc/python-tblib/pull/5>`_.
-        
 Keywords: traceback,debugging,exceptions
-Platform: UNKNOWN
 Classifier: Development Status :: 5 - Production/Stable
 Classifier: Intended Audience :: Developers
 Classifier: License :: OSI Approved :: BSD License
@@ -748,13 +17,752 @@ Classifier: Operating System :: Unix
 Classifier: Operating System :: POSIX
 Classifier: Operating System :: Microsoft :: Windows
 Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2.7
 Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3 :: Only
 Classifier: Programming Language :: Python :: 3.7
 Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
 Classifier: Programming Language :: Python :: Implementation :: CPython
 Classifier: Programming Language :: Python :: Implementation :: PyPy
 Classifier: Topic :: Utilities
-Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Requires-Python: >=3.7
+License-File: LICENSE
+License-File: AUTHORS.rst
+
+========
+Overview
+========
+
+
+
+Serialization library for Exceptions and Tracebacks.
+
+* Free software: BSD license
+
+It allows you to:
+
+* `Pickle <https://docs.python.org/3/library/pickle.html>`_ tracebacks and raise exceptions
+  with pickled tracebacks in different processes. This allows better error handling when running
+  code over multiple processes (imagine multiprocessing, billiard, futures, celery etc).
+* Create traceback objects from strings (the ``from_string`` method). *No pickling is used*.
+* Serialize tracebacks to/from plain dicts (the ``from_dict`` and ``to_dict`` methods). *No pickling is used*.
+* Raise the tracebacks created from the aforementioned sources.
+* Pickle an Exception together with its traceback and exception chain
+  (``raise ... from ...``) *(Python 3 only)*
+
+**Again, note that using the pickle support is completely optional. You are solely responsible for
+security problems should you decide to use the pickle support.**
+
+Installation
+============
+
+::
+
+    pip install tblib
+
+Documentation
+=============
+
+.. contents::
+   :local:
+
+Pickling tracebacks
+~~~~~~~~~~~~~~~~~~~
+
+**Note**: The traceback objects that come out are stripped of some attributes (like variables). But you'll be able to raise exceptions with
+those tracebacks or print them - that should cover 99% of the usecases.
+
+::
+
+    >>> from tblib import pickling_support
+    >>> pickling_support.install()
+    >>> import pickle, sys
+    >>> def inner_0():
+    ...     raise Exception('fail')
+    ...
+    >>> def inner_1():
+    ...     inner_0()
+    ...
+    >>> def inner_2():
+    ...     inner_1()
+    ...
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     s1 = pickle.dumps(sys.exc_info())
+    ...
+    >>> len(s1) > 1
+    True
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     s2 = pickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
+    ...
+    >>> len(s2) > 1
+    True
+
+    >>> try:
+    ...     import cPickle
+    ... except ImportError:
+    ...     import pickle as cPickle
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     s3 = cPickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
+    ...
+    >>> len(s3) > 1
+    True
+
+Unpickling tracebacks
+~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    >>> pickle.loads(s1)
+    (<...Exception'>, Exception('fail'...), <traceback object at ...>)
+
+    >>> pickle.loads(s2)
+    (<...Exception'>, Exception('fail'...), <traceback object at ...>)
+
+    >>> pickle.loads(s3)
+    (<...Exception'>, Exception('fail'...), <traceback object at ...>)
+
+Raising
+~~~~~~~
+
+::
+
+    >>> from six import reraise
+    >>> reraise(*pickle.loads(s1))
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[14]>", line 1, in <module>
+        reraise(*pickle.loads(s2))
+      File "<doctest README.rst[8]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+    >>> reraise(*pickle.loads(s2))
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[14]>", line 1, in <module>
+        reraise(*pickle.loads(s2))
+      File "<doctest README.rst[8]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+    >>> reraise(*pickle.loads(s3))
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[14]>", line 1, in <module>
+        reraise(*pickle.loads(s2))
+      File "<doctest README.rst[8]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+Pickling Exceptions together with their traceback and chain (Python 3 only)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    >>> try:  # doctest: +SKIP
+    ...     try:
+    ...         1 / 0
+    ...     except Exception as e:
+    ...         raise Exception("foo") from e
+    ... except Exception as e:
+    ...     s = pickle.dumps(e)
+    >>> raise pickle.loads(s)  # doctest: +SKIP
+    Traceback (most recent call last):
+      File "<doctest README.rst[16]>", line 3, in <module>
+        1 / 0
+    ZeroDivisionError: division by zero
+
+    The above exception was the direct cause of the following exception:
+
+    Traceback (most recent call last):
+      File "<doctest README.rst[17]>", line 1, in <module>
+        raise pickle.loads(s)
+      File "<doctest README.rst[16]>", line 5, in <module>
+        raise Exception("foo") from e
+    Exception: foo
+
+BaseException subclasses defined after calling ``pickling_support.install()`` will
+**not** retain their traceback and exception chain pickling.
+To cover custom Exceptions, there are three options:
+
+1. Use ``@pickling_support.install`` as a decorator for each custom Exception
+
+    .. code-block:: python
+
+        >>> from tblib import pickling_support
+        >>> # Declare all imports of your package's dependencies
+        >>> import numpy  # doctest: +SKIP
+
+        >>> pickling_support.install()  # install for all modules imported so far
+
+        >>> @pickling_support.install
+        ... class CustomError(Exception):
+        ...     pass
+
+   Eventual subclasses of ``CustomError`` will need to be decorated again.
+
+2. Invoke ``pickling_support.install()`` after all modules have been imported and all
+   Exception subclasses have been declared
+
+    .. code-block:: python
+
+        >>> # Declare all imports of your package's dependencies
+        >>> import numpy  # doctest: +SKIP
+        >>> from tblib import pickling_support
+
+        >>> # Declare your own custom Exceptions
+        >>> class CustomError(Exception):
+        ...     pass
+
+        >>> # Finally, install tblib
+        >>> pickling_support.install()
+
+3. Selectively install tblib for Exception instances just before they are pickled
+
+    .. code-block:: python
+
+       pickling_support.install(<Exception instance>, [Exception instance], ...)
+
+   The above will install tblib pickling for all listed exceptions as well as any other
+   exceptions in their exception chains.
+
+   For example, one could write a wrapper to be used with
+   `ProcessPoolExecutor <https://docs.python.org/3/library/concurrent.futures.html>`_,
+   `Dask.distributed <https://distributed.dask.org/>`_, or similar libraries:
+
+::
+
+    >>> from tblib import pickling_support
+    >>> def wrapper(func, *args, **kwargs):
+    ...     try:
+    ...         return func(*args, **kwargs)
+    ...     except Exception as e:
+    ...         pickling_support.install(e)
+    ...         raise
+
+What if we have a local stack, does it show correctly ?
+-------------------------------------------------------
+
+Yes it does::
+
+    >>> exc_info = pickle.loads(s3)
+    >>> def local_0():
+    ...     reraise(*exc_info)
+    ...
+    >>> def local_1():
+    ...     local_0()
+    ...
+    >>> def local_2():
+    ...     local_1()
+    ...
+    >>> local_2()
+    Traceback (most recent call last):
+      File "...doctest.py", line ..., in __run
+        compileflags, 1) in test.globs
+      File "<doctest README.rst[24]>", line 1, in <module>
+        local_2()
+      File "<doctest README.rst[23]>", line 2, in local_2
+        local_1()
+      File "<doctest README.rst[22]>", line 2, in local_1
+        local_0()
+      File "<doctest README.rst[21]>", line 2, in local_0
+        reraise(*exc_info)
+      File "<doctest README.rst[11]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+It also supports more contrived scenarios
+-----------------------------------------
+
+Like tracebacks with syntax errors::
+
+    >>> from tblib import Traceback
+    >>> from examples import bad_syntax
+    >>> try:
+    ...     bad_syntax()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[58]>", line 1, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[57]>", line 2, in <module>
+        bad_syntax()
+      File "...tests...examples.py", line 18, in bad_syntax
+        import badsyntax
+      File "...tests...badsyntax.py", line 5
+        is very bad
+         ^
+    SyntaxError: invalid syntax
+
+Or other import failures::
+
+    >>> from examples import bad_module
+    >>> try:
+    ...     bad_module()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[61]>", line 1, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[60]>", line 2, in <module>
+        bad_module()
+      File "...tests...examples.py", line 23, in bad_module
+        import badmodule
+      File "...tests...badmodule.py", line 3, in <module>
+        raise Exception("boom!")
+    Exception: boom!
+
+Or a traceback that's caused by exceeding the recursion limit (here we're
+forcing the type and value to have consistency across platforms)::
+
+    >>> def f(): f()
+    >>> try:
+    ...    f()
+    ... except RuntimeError:
+    ...    et, ev, tb = sys.exc_info()
+    ...    tb = Traceback(tb)
+    ...
+    >>> reraise(RuntimeError, RuntimeError("maximum recursion depth exceeded"), tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[32]>", line 1, in f
+        def f(): f()
+      File "<doctest README.rst[32]>", line 1, in f
+        def f(): f()
+      File "<doctest README.rst[32]>", line 1, in f
+        def f(): f()
+      ...
+    RuntimeError: maximum recursion depth exceeded
+
+Reference
+~~~~~~~~~
+
+tblib.Traceback
+---------------
+
+It is used by the ``pickling_support``. You can use it too if you want more flexibility::
+
+    >>> from tblib import Traceback
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[21]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[21]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+tblib.Traceback.to_dict
+```````````````````````
+
+You can use the ``to_dict`` method and the ``from_dict`` classmethod to
+convert a Traceback into and from a dictionary serializable by the stdlib
+json.JSONDecoder::
+
+    >>> import json
+    >>> from pprint import pprint
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...     tb_dict = tb.to_dict()
+    ...     pprint(tb_dict)
+    {'tb_frame': {'f_code': {'co_filename': '<doctest README.rst[...]>',
+                             'co_name': '<module>'},
+                  'f_globals': {'__name__': '__main__'},
+                  'f_lineno': 5},
+     'tb_lineno': 2,
+     'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
+                                         'co_name': 'inner_2'},
+                              'f_globals': {'__name__': '__main__'},
+                              'f_lineno': 2},
+                 'tb_lineno': 2,
+                 'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
+                                                     'co_name': 'inner_1'},
+                                          'f_globals': {'__name__': '__main__'},
+                                          'f_lineno': 2},
+                             'tb_lineno': 2,
+                             'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
+                                                                 'co_name': 'inner_0'},
+                                                      'f_globals': {'__name__': '__main__'},
+                                                      'f_lineno': 2},
+                                         'tb_lineno': 2,
+                                         'tb_next': None}}}}
+
+tblib.Traceback.from_dict
+`````````````````````````
+
+Building on the previous example::
+
+    >>> tb_json = json.dumps(tb_dict)
+    >>> tb = Traceback.from_dict(json.loads(tb_json))
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[21]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[21]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+tblib.Traceback.from_string
+```````````````````````````
+
+::
+
+    >>> tb = Traceback.from_string("""
+    ... File "skipped.py", line 123, in func_123
+    ... Traceback (most recent call last):
+    ...   File "tests/examples.py", line 2, in func_a
+    ...     func_b()
+    ...   File "tests/examples.py", line 6, in func_b
+    ...     func_c()
+    ...   File "tests/examples.py", line 10, in func_c
+    ...     func_d()
+    ...   File "tests/examples.py", line 14, in func_d
+    ... Doesn't: matter
+    ... """)
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[42]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "...examples.py", line 2, in func_a
+        func_b()
+      File "...examples.py", line 6, in func_b
+        func_c()
+      File "...examples.py", line 10, in func_c
+        func_d()
+      File "...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: fail
+
+
+If you use the ``strict=False`` option then parsing is a bit more lax::
+
+    >>> tb = Traceback.from_string("""
+    ... File "bogus.py", line 123, in bogus
+    ... Traceback (most recent call last):
+    ...  File "tests/examples.py", line 2, in func_a
+    ...   func_b()
+    ...    File "tests/examples.py", line 6, in func_b
+    ...     func_c()
+    ...    File "tests/examples.py", line 10, in func_c
+    ...   func_d()
+    ...  File "tests/examples.py", line 14, in func_d
+    ... Doesn't: matter
+    ... """, strict=False)
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[42]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "bogus.py", line 123, in bogus
+      File "...examples.py", line 2, in func_a
+        func_b()
+      File "...examples.py", line 6, in func_b
+        func_c()
+      File "...examples.py", line 10, in func_c
+        func_d()
+      File "...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: fail
+
+tblib.decorators.return_error
+-----------------------------
+
+::
+
+    >>> from tblib.decorators import return_error
+    >>> inner_2r = return_error(inner_2)
+    >>> e = inner_2r()
+    >>> e
+    <tblib.decorators.Error object at ...>
+    >>> e.reraise()
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[26]>", line 1, in <module>
+        e.reraise()
+      File "...tblib...decorators.py", line 19, in reraise
+        reraise(self.exc_type, self.exc_value, self.traceback)
+      File "...tblib...decorators.py", line 25, in return_exceptions_wrapper
+        return func(*args, **kwargs)
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+How's this useful? Imagine you're using multiprocessing like this::
+
+    # Note that Python 3.4 and later will show the remote traceback (but as a string sadly) so we skip testing this.
+    >>> import traceback
+    >>> from multiprocessing import Pool
+    >>> from examples import func_a
+    >>> pool = Pool()  # doctest: +SKIP
+    >>> try:  # doctest: +SKIP
+    ...     for i in pool.map(func_a, range(5)):
+    ...         print(i)
+    ... except:
+    ...     print(traceback.format_exc())
+    ...
+    Traceback (most recent call last):
+      File "<doctest README.rst[...]>", line 2, in <module>
+        for i in pool.map(func_a, range(5)):
+      File "...multiprocessing...pool.py", line ..., in map
+        ...
+      File "...multiprocessing...pool.py", line ..., in get
+        ...
+    Exception: Guessing time !
+    <BLANKLINE>
+    >>> pool.terminate()  # doctest: +SKIP
+
+Not very useful is it? Let's sort this out::
+
+    >>> from tblib.decorators import apply_with_return_error, Error
+    >>> from itertools import repeat
+    >>> pool = Pool()
+    >>> try:
+    ...     for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
+    ...         if isinstance(i, Error):
+    ...             i.reraise()
+    ...         else:
+    ...             print(i)
+    ... except:
+    ...     print(traceback.format_exc())
+    ...
+    Traceback (most recent call last):
+      File "<doctest README.rst[...]>", line 4, in <module>
+        i.reraise()
+      File "...tblib...decorators.py", line ..., in reraise
+        reraise(self.exc_type, self.exc_value, self.traceback)
+      File "...tblib...decorators.py", line ..., in return_exceptions_wrapper
+        return func(*args, **kwargs)
+      File "...tblib...decorators.py", line ..., in apply_with_return_error
+        return args[0](*args[1:])
+      File "...examples.py", line 2, in func_a
+        func_b()
+      File "...examples.py", line 6, in func_b
+        func_c()
+      File "...examples.py", line 10, in func_c
+        func_d()
+      File "...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: Guessing time !
+    <BLANKLINE>
+    >>> pool.terminate()
+
+Much better !
+
+What if we have a local call stack ?
+````````````````````````````````````
+
+::
+
+    >>> def local_0():
+    ...     pool = Pool()
+    ...     try:
+    ...         for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
+    ...             if isinstance(i, Error):
+    ...                 i.reraise()
+    ...             else:
+    ...                 print(i)
+    ...     finally:
+    ...         pool.close()
+    ...
+    >>> def local_1():
+    ...     local_0()
+    ...
+    >>> def local_2():
+    ...     local_1()
+    ...
+    >>> try:
+    ...     local_2()
+    ... except:
+    ...     print(traceback.format_exc())
+    Traceback (most recent call last):
+      File "<doctest README.rst[...]>", line 2, in <module>
+        local_2()
+      File "<doctest README.rst[...]>", line 2, in local_2
+        local_1()
+      File "<doctest README.rst[...]>", line 2, in local_1
+        local_0()
+      File "<doctest README.rst[...]>", line 6, in local_0
+        i.reraise()
+      File "...tblib...decorators.py", line 20, in reraise
+        reraise(self.exc_type, self.exc_value, self.traceback)
+      File "...tblib...decorators.py", line 27, in return_exceptions_wrapper
+        return func(*args, **kwargs)
+      File "...tblib...decorators.py", line 47, in apply_with_return_error
+        return args[0](*args[1:])
+      File "...tests...examples.py", line 2, in func_a
+        func_b()
+      File "...tests...examples.py", line 6, in func_b
+        func_c()
+      File "...tests...examples.py", line 10, in func_c
+        func_d()
+      File "...tests...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: Guessing time !
+    <BLANKLINE>
+
+Other weird stuff
+`````````````````
+
+Clearing traceback works (Python 3.4 and up)::
+
+    >>> tb = Traceback.from_string("""
+    ... File "skipped.py", line 123, in func_123
+    ... Traceback (most recent call last):
+    ...   File "tests/examples.py", line 2, in func_a
+    ...     func_b()
+    ...   File "tests/examples.py", line 6, in func_b
+    ...     func_c()
+    ...   File "tests/examples.py", line 10, in func_c
+    ...     func_d()
+    ...   File "tests/examples.py", line 14, in func_d
+    ... Doesn't: matter
+    ... """)
+    >>> import traceback, sys
+    >>> if sys.version_info > (3, 4):
+    ...     traceback.clear_frames(tb)
+
+Credits
+=======
+
+* `mitsuhiko/jinja2 <https://github.com/mitsuhiko/jinja2>`_ for figuring a way to create traceback objects.
+
+
+Changelog
+=========
+
+2.0.0 (2023-06-22)
+~~~~~~~~~~~~~~~~~~
+
+* Removed support for legacy Pythons (2.7 and 3.6) and added Python 3.11 in the test grid.
+* Some cleanups and refactors (mostly from ruff).
+
+1.7.0 (2020-07-24)
+~~~~~~~~~~~~~~~~~~
+
+* Add more attributes to ``Frame`` and ``Code`` objects for pytest compatibility. Contributed by Ivanq in
+  `#58 <https://github.com/ionelmc/python-tblib/pull/58>`_.
+
+1.6.0 (2019-12-07)
+~~~~~~~~~~~~~~~~~~
+
+* When pickling an Exception, also pickle its traceback and the Exception chain
+  (``raise ... from ...``). Contributed by Guido Imperiale in
+  `#53 <https://github.com/ionelmc/python-tblib/issues/53>`_.
+
+1.5.0 (2019-10-23)
+~~~~~~~~~~~~~~~~~~
+
+* Added support for Python 3.8. Contributed by Victor Stinner in
+  `#42 <https://github.com/ionelmc/python-tblib/issues/42>`_.
+* Removed support for end of life Python 3.4.
+* Few CI improvements and fixes.
+
+1.4.0 (2019-05-02)
+~~~~~~~~~~~~~~~~~~
+
+* Removed support for end of life Python 3.3.
+* Fixed tests for Python 3.7. Contributed by Elliott Sales de Andrade in
+  `#36 <https://github.com/ionelmc/python-tblib/issues/36>`_.
+* Fixed compatibility issue with Twised (``twisted.python.failure.Failure`` expected a ``co_code`` attribute).
+
+1.3.2 (2017-04-09)
+~~~~~~~~~~~~~~~~~~
+
+* Add support for PyPy3.5-5.7.1-beta. Previously ``AttributeError:
+  'Frame' object has no attribute 'clear'``  could be raised. See PyPy
+  issue `#2532 <https://foss.heptapod.net/pypy/pypy/-/issues/2532>`_.
+
+1.3.1 (2017-03-27)
+~~~~~~~~~~~~~~~~~~
+
+* Fixed handling for tracebacks due to exceeding the recursion limit.
+  Fixes `#15 <https://github.com/ionelmc/python-tblib/issues/15>`_.
+
+1.3.0 (2016-03-08)
+~~~~~~~~~~~~~~~~~~
+
+* Added ``Traceback.from_string``.
+
+1.2.0 (2015-12-18)
+~~~~~~~~~~~~~~~~~~
+
+* Fixed handling for tracebacks from generators and other internal improvements
+  and optimizations. Contributed by DRayX in `#10 <https://github.com/ionelmc/python-tblib/issues/10>`_
+  and `#11 <https://github.com/ionelmc/python-tblib/pull/11>`_.
+
+1.1.0 (2015-07-27)
+~~~~~~~~~~~~~~~~~~
+
+* Added support for Python 2.6. Contributed by Arcadiy Ivanov in
+  `#8 <https://github.com/ionelmc/python-tblib/pull/8>`_.
+
+1.0.0 (2015-03-30)
+~~~~~~~~~~~~~~~~~~
+
+* Added ``to_dict`` method and ``from_dict`` classmethod on Tracebacks.
+  Contributed by beckjake in `#5 <https://github.com/ionelmc/python-tblib/pull/5>`_.
diff --git a/README.rst b/README.rst
index 3d003da..1a296cb 100644
--- a/README.rst
+++ b/README.rst
@@ -10,31 +10,22 @@ Overview
     * - docs
       - |docs|
     * - tests
-      - | |travis| |appveyor| |requires|
+      - | |github-actions| |requires|
         | |codecov|
     * - package
       - | |version| |wheel| |supported-versions| |supported-implementations|
         | |commits-since|
-
-.. |docs| image:: https://codecov.io/gh/ionelmc/python-tblib/branch/master/graphs/badge.svg?branch=master
-    :target: https://readthedocs.org/projects/python-tblib
+.. |docs| image:: https://readthedocs.org/projects/python-tblib/badge/?style=flat
+    :target: https://python-tblib.readthedocs.io/
     :alt: Documentation Status
 
-.. |travis| image:: https://api.travis-ci.org/ionelmc/python-tblib.svg?branch=master
-    :alt: Travis-CI Build Status
-    :target: https://travis-ci.org/ionelmc/python-tblib
-
-.. |appveyor| image:: https://ci.appveyor.com/api/projects/status/github/ionelmc/python-tblib?branch=master&svg=true
-    :alt: AppVeyor Build Status
-    :target: https://ci.appveyor.com/project/ionelmc/python-tblib
-
-.. |requires| image:: https://requires.io/github/ionelmc/python-tblib/requirements.svg?branch=master
-    :alt: Requirements Status
-    :target: https://requires.io/github/ionelmc/python-tblib/requirements/?branch=master
+.. |github-actions| image:: https://github.com/ionelmc/python-tblib/actions/workflows/github-actions.yml/badge.svg
+    :alt: GitHub Actions Build Status
+    :target: https://github.com/ionelmc/python-tblib/actions
 
-.. |codecov| image:: https://codecov.io/github/ionelmc/python-tblib/coverage.svg?branch=master
+.. |codecov| image:: https://codecov.io/gh/ionelmc/python-tblib/branch/master/graphs/badge.svg?branch=master
     :alt: Coverage Status
-    :target: https://codecov.io/github/ionelmc/python-tblib
+    :target: https://app.codecov.io/github/ionelmc/python-tblib
 
 .. |version| image:: https://img.shields.io/pypi/v/tblib.svg
     :alt: PyPI Package latest release
@@ -52,9 +43,9 @@ Overview
     :alt: Supported implementations
     :target: https://pypi.org/project/tblib
 
-.. |commits-since| image:: https://img.shields.io/github/commits-since/ionelmc/python-tblib/v1.7.0.svg
+.. |commits-since| image:: https://img.shields.io/github/commits-since/ionelmc/python-tblib/v2.0.0.svg
     :alt: Commits since latest release
-    :target: https://github.com/ionelmc/python-tblib/compare/v1.7.0...master
+    :target: https://github.com/ionelmc/python-tblib/compare/v2.0.0...master
 
 .. end-badges
 
diff --git a/ci/appveyor-download.py b/ci/appveyor-download.py
deleted file mode 100755
index 8373863..0000000
--- a/ci/appveyor-download.py
+++ /dev/null
@@ -1,109 +0,0 @@
-#!/usr/bin/env python
-"""
-Use the AppVeyor API to download Windows artifacts.
-
-Taken from: https://bitbucket.org/ned/coveragepy/src/tip/ci/download_appveyor.py
-# Licensed under the Apache License: https://www.apache.org/licenses/LICENSE-2.0
-# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt
-"""
-from __future__ import unicode_literals
-
-import argparse
-import os
-import zipfile
-
-import requests
-
-
-def make_auth_headers():
-    """Make the authentication headers needed to use the Appveyor API."""
-    path = os.path.expanduser("~/.appveyor.token")
-    if not os.path.exists(path):
-        raise RuntimeError(
-            "Please create a file named `.appveyor.token` in your home directory. "
-            "You can get the token from https://ci.appveyor.com/api-token"
-        )
-    with open(path) as f:
-        token = f.read().strip()
-
-    headers = {
-        'Authorization': 'Bearer {}'.format(token),
-    }
-    return headers
-
-
-def download_latest_artifacts(account_project, build_id):
-    """Download all the artifacts from the latest build."""
-    if build_id is None:
-        url = "https://ci.appveyor.com/api/projects/{}".format(account_project)
-    else:
-        url = "https://ci.appveyor.com/api/projects/{}/build/{}".format(account_project, build_id)
-    build = requests.get(url, headers=make_auth_headers()).json()
-    jobs = build['build']['jobs']
-    print(u"Build {0[build][version]}, {1} jobs: {0[build][message]}".format(build, len(jobs)))
-
-    for job in jobs:
-        name = job['name']
-        print(u"  {0}: {1[status]}, {1[artifactsCount]} artifacts".format(name, job))
-
-        url = "https://ci.appveyor.com/api/buildjobs/{}/artifacts".format(job['jobId'])
-        response = requests.get(url, headers=make_auth_headers())
-        artifacts = response.json()
-
-        for artifact in artifacts:
-            is_zip = artifact['type'] == "Zip"
-            filename = artifact['fileName']
-            print(u"    {0}, {1} bytes".format(filename, artifact['size']))
-
-            url = "https://ci.appveyor.com/api/buildjobs/{}/artifacts/{}".format(job['jobId'], filename)
-            download_url(url, filename, make_auth_headers())
-
-            if is_zip:
-                unpack_zipfile(filename)
-                os.remove(filename)
-
-
-def ensure_dirs(filename):
-    """Make sure the directories exist for `filename`."""
-    dirname = os.path.dirname(filename)
-    if dirname and not os.path.exists(dirname):
-        os.makedirs(dirname)
-
-
-def download_url(url, filename, headers):
-    """Download a file from `url` to `filename`."""
-    ensure_dirs(filename)
-    response = requests.get(url, headers=headers, stream=True)
-    if response.status_code == 200:
-        with open(filename, 'wb') as f:
-            for chunk in response.iter_content(16 * 1024):
-                f.write(chunk)
-    else:
-        print(u"    Error downloading {}: {}".format(url, response))
-
-
-def unpack_zipfile(filename):
-    """Unpack a zipfile, using the names in the zip."""
-    with open(filename, 'rb') as fzip:
-        z = zipfile.ZipFile(fzip)
-        for name in z.namelist():
-            print(u"      extracting {}".format(name))
-            ensure_dirs(name)
-            z.extract(name)
-
-
-parser = argparse.ArgumentParser(description='Download artifacts from AppVeyor.')
-parser.add_argument('--id',
-                    metavar='PROJECT_ID',
-                    default='ionelmc/python-tblib',
-                    help='Project ID in AppVeyor.')
-parser.add_argument('build',
-                    nargs='?',
-                    metavar='BUILD_ID',
-                    help='Build ID in AppVeyor. Eg: master-123')
-
-if __name__ == "__main__":
-    # import logging
-    # logging.basicConfig(level="DEBUG")
-    args = parser.parse_args()
-    download_latest_artifacts(args.id, args.build)
diff --git a/ci/appveyor-with-compiler.cmd b/ci/appveyor-with-compiler.cmd
deleted file mode 100644
index 289585f..0000000
--- a/ci/appveyor-with-compiler.cmd
+++ /dev/null
@@ -1,23 +0,0 @@
-:: Very simple setup:
-:: - if WINDOWS_SDK_VERSION is set then activate the SDK.
-:: - disable the WDK if it's around.
-
-SET COMMAND_TO_RUN=%*
-SET WIN_SDK_ROOT=C:\Program Files\Microsoft SDKs\Windows
-SET WIN_WDK="c:\Program Files (x86)\Windows Kits\10\Include\wdf"
-ECHO SDK: %WINDOWS_SDK_VERSION% ARCH: %PYTHON_ARCH%
-
-IF EXIST %WIN_WDK% (
-    REM See: https://connect.microsoft.com/VisualStudio/feedback/details/1610302/
-    REN %WIN_WDK% 0wdf
-)
-IF "%WINDOWS_SDK_VERSION%"=="" GOTO main
-
-SET DISTUTILS_USE_SDK=1
-SET MSSdk=1
-"%WIN_SDK_ROOT%\%WINDOWS_SDK_VERSION%\Setup\WindowsSdkVer.exe" -q -version:%WINDOWS_SDK_VERSION%
-CALL "%WIN_SDK_ROOT%\%WINDOWS_SDK_VERSION%\Bin\SetEnv.cmd" /x64 /release
-
-:main
-ECHO Executing: %COMMAND_TO_RUN%
-CALL %COMMAND_TO_RUN% || EXIT 1
diff --git a/ci/bootstrap.py b/ci/bootstrap.py
index 2597983..f3c9a7e 100755
--- a/ci/bootstrap.py
+++ b/ci/bootstrap.py
@@ -1,64 +1,57 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import os
+import pathlib
 import subprocess
 import sys
-from os.path import abspath
-from os.path import dirname
-from os.path import exists
-from os.path import join
 
-base_path = dirname(dirname(abspath(__file__)))
+base_path: pathlib.Path = pathlib.Path(__file__).resolve().parent.parent
+templates_path = base_path / 'ci' / 'templates'
 
 
 def check_call(args):
-    print("+", *args)
+    print('+', *args)
     subprocess.check_call(args)
 
 
 def exec_in_env():
-    env_path = join(base_path, ".tox", "bootstrap")
-    if sys.platform == "win32":
-        bin_path = join(env_path, "Scripts")
+    env_path = base_path / '.tox' / 'bootstrap'
+    if sys.platform == 'win32':
+        bin_path = env_path / 'Scripts'
     else:
-        bin_path = join(env_path, "bin")
-    if not exists(env_path):
+        bin_path = env_path / 'bin'
+    if not env_path.exists():
         import subprocess
 
-        print("Making bootstrap env in: {0} ...".format(env_path))
+        print(f'Making bootstrap env in: {env_path} ...')
         try:
-            check_call([sys.executable, "-m", "venv", env_path])
+            check_call([sys.executable, '-m', 'venv', env_path])
         except subprocess.CalledProcessError:
             try:
-                check_call([sys.executable, "-m", "virtualenv", env_path])
+                check_call([sys.executable, '-m', 'virtualenv', env_path])
             except subprocess.CalledProcessError:
-                check_call(["virtualenv", env_path])
-        print("Installing `jinja2` into bootstrap environment...")
-        check_call([join(bin_path, "pip"), "install", "jinja2", "tox"])
-    python_executable = join(bin_path, "python")
-    if not os.path.exists(python_executable):
-        python_executable += '.exe'
+                check_call(['virtualenv', env_path])
+        print('Installing `jinja2` into bootstrap environment...')
+        check_call([bin_path / 'pip', 'install', 'jinja2', 'tox'])
+    python_executable = bin_path / 'python'
+    if not python_executable.exists():
+        python_executable = python_executable.with_suffix('.exe')
+
+    print(f'Re-executing with: {python_executable}')
+    print('+ exec', python_executable, __file__, '--no-env')
+    os.execv(python_executable, [python_executable, __file__, '--no-env'])
 
-    print("Re-executing with: {0}".format(python_executable))
-    print("+ exec", python_executable, __file__, "--no-env")
-    os.execv(python_executable, [python_executable, __file__, "--no-env"])
 
 def main():
     import jinja2
 
-    print("Project path: {0}".format(base_path))
+    print(f'Project path: {base_path}')
 
     jinja = jinja2.Environment(
-        loader=jinja2.FileSystemLoader(join(base_path, "ci", "templates")),
+        loader=jinja2.FileSystemLoader(str(templates_path)),
         trim_blocks=True,
         lstrip_blocks=True,
-        keep_trailing_newline=True
+        keep_trailing_newline=True,
     )
-
     tox_environments = [
         line.strip()
         # 'tox' need not be installed globally, but must be importable
@@ -69,21 +62,22 @@ def main():
         for line in subprocess.check_output([sys.executable, '-m', 'tox', '--listenvs'], universal_newlines=True).splitlines()
     ]
     tox_environments = [line for line in tox_environments if line.startswith('py')]
+    for template in templates_path.rglob('*'):
+        if template.is_file():
+            template_path = template.relative_to(templates_path).as_posix()
+            destination = base_path / template_path
+            destination.parent.mkdir(parents=True, exist_ok=True)
+            destination.write_text(jinja.get_template(template_path).render(tox_environments=tox_environments))
+            print(f'Wrote {template_path}')
+    print('DONE.')
 
-    for name in os.listdir(join("ci", "templates")):
-        with open(join(base_path, name), "w") as fh:
-            fh.write(jinja.get_template(name).render(tox_environments=tox_environments))
-        print("Wrote {}".format(name))
-    print("DONE.")
 
-
-if __name__ == "__main__":
+if __name__ == '__main__':
     args = sys.argv[1:]
-    if args == ["--no-env"]:
+    if args == ['--no-env']:
         main()
     elif not args:
         exec_in_env()
     else:
-        print("Unexpected arguments {0}".format(args), file=sys.stderr)
+        print(f'Unexpected arguments: {args}', file=sys.stderr)
         sys.exit(1)
-
diff --git a/ci/requirements.txt b/ci/requirements.txt
index b2a21e5..a1708f4 100644
--- a/ci/requirements.txt
+++ b/ci/requirements.txt
@@ -1,4 +1,6 @@
 virtualenv>=16.6.0
 pip>=19.1.1
 setuptools>=18.0.1
-six>=1.12.0
+six>=1.14.0
+tox
+twine
diff --git a/ci/templates/.appveyor.yml b/ci/templates/.appveyor.yml
deleted file mode 100644
index bb4a055..0000000
--- a/ci/templates/.appveyor.yml
+++ /dev/null
@@ -1,49 +0,0 @@
-version: '{branch}-{build}'
-build: off
-environment:
-  matrix:
-    - TOXENV: check
-      TOXPYTHON: C:\Python36\python.exe
-      PYTHON_HOME: C:\Python36
-      PYTHON_VERSION: '3.6'
-      PYTHON_ARCH: '32'
-{% for env in tox_environments %}
-{% if env.startswith(('py2', 'py3')) %}
-    - TOXENV: {{ env }},codecov{{ "" }}
-      TOXPYTHON: C:\Python{{ env[2:4] }}\python.exe
-      PYTHON_HOME: C:\Python{{ env[2:4] }}
-      PYTHON_VERSION: '{{ env[2] }}.{{ env[3] }}'
-      PYTHON_ARCH: '32'
-{% if 'nocov' in env %}
-      WHEEL_PATH: .tox/dist
-{% endif %}
-    - TOXENV: {{ env }},codecov{{ "" }}
-      TOXPYTHON: C:\Python{{ env[2:4] }}-x64\python.exe
-      PYTHON_HOME: C:\Python{{ env[2:4] }}-x64
-      PYTHON_VERSION: '{{ env[2] }}.{{ env[3] }}'
-      PYTHON_ARCH: '64'
-{% if 'nocov' in env %}
-      WHEEL_PATH: .tox/dist
-{% endif %}
-{% if env.startswith('py2') %}
-      WINDOWS_SDK_VERSION: v7.0
-{% endif %}
-{% endif %}{% endfor %}
-init:
-  - ps: echo $env:TOXENV
-  - ps: ls C:\Python*
-install:
-  - '%PYTHON_HOME%\python -mpip install --progress-bar=off tox -rci/requirements.txt'
-  - '%PYTHON_HOME%\Scripts\virtualenv --version'
-  - '%PYTHON_HOME%\Scripts\easy_install --version'
-  - '%PYTHON_HOME%\Scripts\pip --version'
-  - '%PYTHON_HOME%\Scripts\tox --version'
-test_script:
-  - cmd /E:ON /V:ON /C .\ci\appveyor-with-compiler.cmd %PYTHON_HOME%\Scripts\tox
-on_failure:
-  - ps: dir "env:"
-  - ps: get-content .tox\*\log\*
-
-### To enable remote debugging uncomment this (also, see: http://www.appveyor.com/docs/how-to/rdp-to-build-worker):
-# on_finish:
-#   - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
diff --git a/ci/templates/.github/workflows/github-actions.yml b/ci/templates/.github/workflows/github-actions.yml
new file mode 100644
index 0000000..b8e2655
--- /dev/null
+++ b/ci/templates/.github/workflows/github-actions.yml
@@ -0,0 +1,65 @@
+name: build
+on: [push, pull_request]
+jobs:
+  test:
+    name: {{ '${{ matrix.name }}' }}
+    runs-on: {{ '${{ matrix.os }}' }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: 'check'
+            python: '3.11'
+            toxpython: 'python3.11'
+            tox_env: 'check'
+            os: 'ubuntu-latest'
+          - name: 'docs'
+            python: '3.11'
+            toxpython: 'python3.11'
+            tox_env: 'docs'
+            os: 'ubuntu-latest'
+{% for env in tox_environments %}
+{% set prefix = env.split('-')[0] -%}
+{% if prefix.startswith('pypy') %}
+{% set python %}pypy-{{ prefix[4] }}.{{ prefix[5] }}{% endset %}
+{% set cpython %}pp{{ prefix[4:5] }}{% endset %}
+{% set toxpython %}pypy{{ prefix[4] }}.{{ prefix[5] }}{% endset %}
+{% else %}
+{% set python %}{{ prefix[2] }}.{{ prefix[3:] }}{% endset %}
+{% set cpython %}cp{{ prefix[2:] }}{% endset %}
+{% set toxpython %}python{{ prefix[2] }}.{{ prefix[3:] }}{% endset %}
+{% endif %}
+{% for os, python_arch in [
+    ['ubuntu', 'x64'],
+    ['windows', 'x64'],
+    ['macos', 'x64'],
+] %}
+          - name: '{{ env }} ({{ os }})'
+            python: '{{ python }}'
+            toxpython: '{{ toxpython }}'
+            python_arch: '{{ python_arch }}'
+            tox_env: '{{ env }}'
+            os: '{{ os }}-latest'
+{% endfor %}
+{% endfor %}
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@v4
+      with:
+        python-version: {{ '${{ matrix.python }}' }}
+        architecture: {{ '${{ matrix.python_arch }}' }}
+    - name: install dependencies
+      run: |
+        python -mpip install --progress-bar=off -r ci/requirements.txt
+        virtualenv --version
+        pip --version
+        tox --version
+        pip list --format=freeze
+    - name: test
+      env:
+        TOXPYTHON: '{{ '${{ matrix.toxpython }}' }}'
+      run: >
+        tox -e {{ '${{ matrix.tox_env }}' }} -v
diff --git a/ci/templates/.travis.yml b/ci/templates/.travis.yml
deleted file mode 100644
index 03110ef..0000000
--- a/ci/templates/.travis.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-language: python
-dist: xenial
-cache: false
-env:
-  global:
-    - LD_PRELOAD=/lib/x86_64-linux-gnu/libSegFault.so
-    - SEGFAULT_SIGNALS=all
-matrix:
-  include:
-    - python: '3.6'
-      env:
-        - TOXENV=check
-    - python: '3.6'
-      env:
-        - TOXENV=docs
-{%- for env in tox_environments %}{{ '' }}
-    - env:
-        - TOXENV={{ env }},codecov
-{%- if env.startswith('pypy3') %}{{ '' }}
-        - TOXPYTHON=pypy3
-      python: 'pypy3'
-{%- elif env.startswith('pypy') %}{{ '' }}
-      python: 'pypy'
-{%- else %}{{ '' }}
-      python: '{{ '{0[2]}.{0[3]}'.format(env) }}'
-{%- endif %}
-{%- endfor %}{{ '' }}
-before_install:
-  - python --version
-  - uname -a
-  - lsb_release -a || true
-install:
-  - python -mpip install --progress-bar=off tox -rci/requirements.txt
-  - virtualenv --version
-  - easy_install --version
-  - pip --version
-  - tox --version
-script:
-  - tox -v
-after_failure:
-  - more .tox/log/* | cat
-  - more .tox/*/log/* | cat
-notifications:
-  email:
-    on_success: never
-    on_failure: always
diff --git a/debian/changelog b/debian/changelog
index c32072f..a7b7aae 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,8 +1,9 @@
-python-tblib (1.7.0-4) UNRELEASED; urgency=medium
+python-tblib (2.0.0-1) UNRELEASED; urgency=medium
 
   * Update watch file format version to 4.
+  * New upstream release.
 
- -- Colin Watson <cjwatson@debian.org>  Mon, 02 Jan 2023 14:02:24 -0000
+ -- Colin Watson <cjwatson@debian.org>  Wed, 28 Jun 2023 22:44:24 +0100
 
 python-tblib (1.7.0-3) unstable; urgency=medium
 
diff --git a/docs/conf.py b/docs/conf.py
index af0256c..2169b97 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,7 +1,4 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
-import os
+import sphinx_py3doc_enhanced_theme
 
 extensions = [
     'autoapi.extension',
@@ -19,10 +16,10 @@ autoapi_dirs = ['../src']
 source_suffix = '.rst'
 master_doc = 'index'
 project = 'tblib'
-year = '2013-2020'
+year = '2013-2022'
 author = 'Ionel Cristian Mărieș'
-copyright = '{0}, {1}'.format(year, author)
-version = release = '1.7.0'
+copyright = f'{year}, {author}'
+version = release = '2.0.0'
 
 pygments_style = 'trac'
 templates_path = ['.']
@@ -30,20 +27,19 @@ extlinks = {
     'issue': ('https://github.com/ionelmc/python-tblib/issues/%s', '#'),
     'pr': ('https://github.com/ionelmc/python-tblib/pull/%s', 'PR #'),
 }
-import sphinx_py3doc_enhanced_theme
-html_theme = "sphinx_py3doc_enhanced_theme"
+html_theme = 'sphinx_py3doc_enhanced_theme'
 html_theme_path = [sphinx_py3doc_enhanced_theme.get_html_theme_path()]
 html_theme_options = {
-    'githuburl': 'https://github.com/ionelmc/python-tblib/'
+    'githuburl': 'https://github.com/ionelmc/python-tblib/',
 }
 
 html_use_smartypants = True
 html_last_updated_fmt = '%b %d, %Y'
 html_split_index = False
 html_sidebars = {
-   '**': ['searchbox.html', 'globaltoc.html', 'sourcelink.html'],
+    '**': ['searchbox.html', 'globaltoc.html', 'sourcelink.html'],
 }
-html_short_title = '%s-%s' % (project, version)
+html_short_title = f'{project}-{version}'
 
 napoleon_use_ivar = True
 napoleon_use_rtype = False
diff --git a/docs/index.rst b/docs/index.rst
index e55d633..040ea20 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -9,6 +9,7 @@ Contents
    installation
    usage
    contributing
+   autoapi/index
    authors
    changelog
 
@@ -18,4 +19,3 @@ Indices and tables
 * :ref:`genindex`
 * :ref:`modindex`
 * :ref:`search`
-
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..c9dd47b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,58 @@
+[build-system]
+requires = [
+    "setuptools>=30.3.0",
+    "wheel",
+]
+
+[tool.ruff.per-file-ignores]
+"ci/*" = ["S"]
+
+[tool.ruff]
+extend-exclude = ["static", "ci/templates"]
+ignore = [
+    "RUF001", # ruff-specific rules ambiguous-unicode-character-string
+    "S101", # flake8-bandit assert
+    "S301", # flake8-bandit pickle
+    "S308", # flake8-bandit suspicious-mark-safe-usage
+    "E501", # pycodestyle line-too-long
+]
+line-length = 140
+select = [
+    "B", # flake8-bugbear
+    "C4", # flake8-comprehensions
+    "DTZ", # flake8-datetimez
+    "E", # pycodestyle errors
+    "EXE", # flake8-executable
+    "F", # pyflakes
+    "I", # isort
+    "INT", # flake8-gettext
+    "PIE", # flake8-pie
+    "PLC", # pylint convention
+    "PLE", # pylint errors
+    "PT", # flake8-pytest-style
+    "PTH", # flake8-use-pathlib
+    "Q", # flake8-quotes
+    "RSE", # flake8-raise
+    "RUF", # ruff-specific rules
+    "S", # flake8-bandit
+    "UP", # pyupgrade
+    "W", # pycodestyle warnings
+]
+src = ["src", "tests"]
+target-version = "py37"
+
+[tool.ruff.flake8-pytest-style]
+fixture-parentheses = false
+mark-parentheses = false
+
+[tool.ruff.isort]
+forced-separate = ["conftest"]
+force-single-line = true
+
+[tool.black]
+line-length = 140
+target-version = ["py37"]
+skip-string-normalization = true
+
+[tool.ruff.flake8-quotes]
+inline-quotes = "single"
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..5f7ccc6
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,30 @@
+[pytest]
+# If a pytest section is found in one of the possible config files
+# (pytest.ini, tox.ini or setup.cfg), then pytest will not look for any others,
+# so if you add a pytest config section elsewhere,
+# you will need to delete this section from setup.cfg.
+norecursedirs =
+    migrations
+
+python_files =
+    test_*.py
+    *_test.py
+    tests.py
+addopts =
+    -ra
+    --strict-markers
+    --ignore=tests/badmodule.py
+    --ignore=tests/badsyntax.py
+    --doctest-modules
+    --doctest-glob=\*.rst
+    --tb=short
+testpaths =
+    tests
+
+# Idea from: https://til.simonwillison.net/pytest/treat-warnings-as-errors
+filterwarnings =
+    error
+# You can add exclusions, some examples:
+#    ignore:'tblib' defines default_app_config:PendingDeprecationWarning::
+#    ignore:The {{% if:::
+#    ignore:Coverage disabled via --no-cov switch!
diff --git a/setup.cfg b/setup.cfg
index 597f8af..8bfd5a1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,38 +1,3 @@
-[bdist_wheel]
-universal = 1
-
-[flake8]
-max-line-length = 140
-exclude = */migrations/*
-
-[tool:pytest]
-norecursedirs = 
-	migrations
-python_files = 
-	test_*.py
-	*_test.py
-	tests.py
-addopts = 
-	-ra
-	--strict
-	--ignore=tests/badmodule.py
-	--ignore=tests/badsyntax.py
-	--doctest-modules
-	--doctest-continue-on-failure
-	--doctest-glob=\*.rst
-	--tb=short
-testpaths = 
-	tests
-
-[tool:isort]
-force_single_line = True
-line_length = 120
-known_first_party = tblib
-default_section = THIRDPARTY
-forced_separate = test_tblib
-not_skip = __init__.py
-skip = migrations
-
 [egg_info]
 tag_build = 
 tag_date = 0
diff --git a/setup.py b/setup.py
index 9193b68..f47d250 100644..100755
--- a/setup.py
+++ b/setup.py
@@ -1,43 +1,31 @@
 #!/usr/bin/env python
-# -*- encoding: utf-8 -*-
-from __future__ import absolute_import
-from __future__ import print_function
-
-import io
 import re
-from glob import glob
-from os.path import basename
-from os.path import dirname
-from os.path import join
-from os.path import splitext
+from pathlib import Path
 
 from setuptools import find_packages
 from setuptools import setup
 
 
 def read(*names, **kwargs):
-    with io.open(
-        join(dirname(__file__), *names),
-        encoding=kwargs.get('encoding', 'utf8')
-    ) as fh:
+    with Path(__file__).parent.joinpath(*names).open(encoding=kwargs.get('encoding', 'utf8')) as fh:
         return fh.read()
 
 
 setup(
     name='tblib',
-    version='1.7.0',
+    version='2.0.0',
     license='BSD-2-Clause',
     description='Traceback serialization library.',
-    long_description='%s\n%s' % (
+    long_description='{}\n{}'.format(
         re.compile('^.. start-badges.*^.. end-badges', re.M | re.S).sub('', read('README.rst')),
-        re.sub(':[a-z]+:`~?(.*?)`', r'``\1``', read('CHANGELOG.rst'))
+        re.sub(':[a-z]+:`~?(.*?)`', r'``\1``', read('CHANGELOG.rst')),
     ),
     author='Ionel Cristian Mărieș',
     author_email='contact@ionelmc.ro',
     url='https://github.com/ionelmc/python-tblib',
     packages=find_packages('src'),
     package_dir={'': 'src'},
-    py_modules=[splitext(basename(path))[0] for path in glob('src/*.py')],
+    py_modules=[path.stem for path in Path('src').glob('*.py')],
     include_package_data=True,
     zip_safe=False,
     classifiers=[
@@ -49,12 +37,13 @@ setup(
         'Operating System :: POSIX',
         'Operating System :: Microsoft :: Windows',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3 :: Only',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         # uncomment if you test on these interpreters:
@@ -69,9 +58,11 @@ setup(
         'Issue Tracker': 'https://github.com/ionelmc/python-tblib/issues',
     },
     keywords=[
-        'traceback', 'debugging', 'exceptions',
+        'traceback',
+        'debugging',
+        'exceptions',
     ],
-    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
+    python_requires='>=3.7',
     install_requires=[
         # eg: 'aspectlib==1.1.1', 'six>=1.7',
     ],
diff --git a/src/tblib.egg-info/PKG-INFO b/src/tblib.egg-info/PKG-INFO
index 122805d..b15d380 100644
--- a/src/tblib.egg-info/PKG-INFO
+++ b/src/tblib.egg-info/PKG-INFO
@@ -1,6 +1,6 @@
-Metadata-Version: 1.2
+Metadata-Version: 2.1
 Name: tblib
-Version: 1.7.0
+Version: 2.0.0
 Summary: Traceback serialization library.
 Home-page: https://github.com/ionelmc/python-tblib
 Author: Ionel Cristian Mărieș
@@ -9,738 +9,7 @@ License: BSD-2-Clause
 Project-URL: Documentation, https://python-tblib.readthedocs.io/
 Project-URL: Changelog, https://python-tblib.readthedocs.io/en/latest/changelog.html
 Project-URL: Issue Tracker, https://github.com/ionelmc/python-tblib/issues
-Description: ========
-        Overview
-        ========
-        
-        
-        
-        Serialization library for Exceptions and Tracebacks.
-        
-        * Free software: BSD license
-        
-        It allows you to:
-        
-        * `Pickle <https://docs.python.org/3/library/pickle.html>`_ tracebacks and raise exceptions
-          with pickled tracebacks in different processes. This allows better error handling when running
-          code over multiple processes (imagine multiprocessing, billiard, futures, celery etc).
-        * Create traceback objects from strings (the ``from_string`` method). *No pickling is used*.
-        * Serialize tracebacks to/from plain dicts (the ``from_dict`` and ``to_dict`` methods). *No pickling is used*.
-        * Raise the tracebacks created from the aforementioned sources.
-        * Pickle an Exception together with its traceback and exception chain
-          (``raise ... from ...``) *(Python 3 only)*
-        
-        **Again, note that using the pickle support is completely optional. You are solely responsible for
-        security problems should you decide to use the pickle support.**
-        
-        Installation
-        ============
-        
-        ::
-        
-            pip install tblib
-        
-        Documentation
-        =============
-        
-        .. contents::
-           :local:
-        
-        Pickling tracebacks
-        ~~~~~~~~~~~~~~~~~~~
-        
-        **Note**: The traceback objects that come out are stripped of some attributes (like variables). But you'll be able to raise exceptions with
-        those tracebacks or print them - that should cover 99% of the usecases.
-        
-        ::
-        
-            >>> from tblib import pickling_support
-            >>> pickling_support.install()
-            >>> import pickle, sys
-            >>> def inner_0():
-            ...     raise Exception('fail')
-            ...
-            >>> def inner_1():
-            ...     inner_0()
-            ...
-            >>> def inner_2():
-            ...     inner_1()
-            ...
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     s1 = pickle.dumps(sys.exc_info())
-            ...
-            >>> len(s1) > 1
-            True
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     s2 = pickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
-            ...
-            >>> len(s2) > 1
-            True
-        
-            >>> try:
-            ...     import cPickle
-            ... except ImportError:
-            ...     import pickle as cPickle
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     s3 = cPickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
-            ...
-            >>> len(s3) > 1
-            True
-        
-        Unpickling tracebacks
-        ~~~~~~~~~~~~~~~~~~~~~
-        
-        ::
-        
-            >>> pickle.loads(s1)
-            (<...Exception'>, Exception('fail'...), <traceback object at ...>)
-        
-            >>> pickle.loads(s2)
-            (<...Exception'>, Exception('fail'...), <traceback object at ...>)
-        
-            >>> pickle.loads(s3)
-            (<...Exception'>, Exception('fail'...), <traceback object at ...>)
-        
-        Raising
-        ~~~~~~~
-        
-        ::
-        
-            >>> from six import reraise
-            >>> reraise(*pickle.loads(s1))
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[14]>", line 1, in <module>
-                reraise(*pickle.loads(s2))
-              File "<doctest README.rst[8]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-            >>> reraise(*pickle.loads(s2))
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[14]>", line 1, in <module>
-                reraise(*pickle.loads(s2))
-              File "<doctest README.rst[8]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-            >>> reraise(*pickle.loads(s3))
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[14]>", line 1, in <module>
-                reraise(*pickle.loads(s2))
-              File "<doctest README.rst[8]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        Pickling Exceptions together with their traceback and chain (Python 3 only)
-        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-        
-        ::
-        
-            >>> try:  # doctest: +SKIP
-            ...     try:
-            ...         1 / 0
-            ...     except Exception as e:
-            ...         raise Exception("foo") from e
-            ... except Exception as e:
-            ...     s = pickle.dumps(e)
-            >>> raise pickle.loads(s)  # doctest: +SKIP
-            Traceback (most recent call last):
-              File "<doctest README.rst[16]>", line 3, in <module>
-                1 / 0
-            ZeroDivisionError: division by zero
-        
-            The above exception was the direct cause of the following exception:
-        
-            Traceback (most recent call last):
-              File "<doctest README.rst[17]>", line 1, in <module>
-                raise pickle.loads(s)
-              File "<doctest README.rst[16]>", line 5, in <module>
-                raise Exception("foo") from e
-            Exception: foo
-        
-        BaseException subclasses defined after calling ``pickling_support.install()`` will
-        **not** retain their traceback and exception chain pickling.
-        To cover custom Exceptions, there are three options:
-        
-        1. Use ``@pickling_support.install`` as a decorator for each custom Exception
-        
-            .. code-block:: python
-        
-                >>> from tblib import pickling_support
-                >>> # Declare all imports of your package's dependencies
-                >>> import numpy  # doctest: +SKIP
-        
-                >>> pickling_support.install()  # install for all modules imported so far
-        
-                >>> @pickling_support.install
-                ... class CustomError(Exception):
-                ...     pass
-        
-           Eventual subclasses of ``CustomError`` will need to be decorated again.
-        
-        2. Invoke ``pickling_support.install()`` after all modules have been imported and all
-           Exception subclasses have been declared
-        
-            .. code-block:: python
-        
-                >>> # Declare all imports of your package's dependencies
-                >>> import numpy  # doctest: +SKIP
-                >>> from tblib import pickling_support
-        
-                >>> # Declare your own custom Exceptions
-                >>> class CustomError(Exception):
-                ...     pass
-        
-                >>> # Finally, install tblib
-                >>> pickling_support.install()
-        
-        3. Selectively install tblib for Exception instances just before they are pickled
-        
-            .. code-block:: python
-        
-               pickling_support.install(<Exception instance>, [Exception instance], ...)
-        
-           The above will install tblib pickling for all listed exceptions as well as any other
-           exceptions in their exception chains.
-        
-           For example, one could write a wrapper to be used with
-           `ProcessPoolExecutor <https://docs.python.org/3/library/concurrent.futures.html>`_,
-           `Dask.distributed <https://distributed.dask.org/>`_, or similar libraries:
-        
-        ::
-        
-            >>> from tblib import pickling_support
-            >>> def wrapper(func, *args, **kwargs):
-            ...     try:
-            ...         return func(*args, **kwargs)
-            ...     except Exception as e:
-            ...         pickling_support.install(e)
-            ...         raise
-        
-        What if we have a local stack, does it show correctly ?
-        -------------------------------------------------------
-        
-        Yes it does::
-        
-            >>> exc_info = pickle.loads(s3)
-            >>> def local_0():
-            ...     reraise(*exc_info)
-            ...
-            >>> def local_1():
-            ...     local_0()
-            ...
-            >>> def local_2():
-            ...     local_1()
-            ...
-            >>> local_2()
-            Traceback (most recent call last):
-              File "...doctest.py", line ..., in __run
-                compileflags, 1) in test.globs
-              File "<doctest README.rst[24]>", line 1, in <module>
-                local_2()
-              File "<doctest README.rst[23]>", line 2, in local_2
-                local_1()
-              File "<doctest README.rst[22]>", line 2, in local_1
-                local_0()
-              File "<doctest README.rst[21]>", line 2, in local_0
-                reraise(*exc_info)
-              File "<doctest README.rst[11]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        It also supports more contrived scenarios
-        -----------------------------------------
-        
-        Like tracebacks with syntax errors::
-        
-            >>> from tblib import Traceback
-            >>> from examples import bad_syntax
-            >>> try:
-            ...     bad_syntax()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[58]>", line 1, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[57]>", line 2, in <module>
-                bad_syntax()
-              File "...tests...examples.py", line 18, in bad_syntax
-                import badsyntax
-              File "...tests...badsyntax.py", line 5
-                is very bad
-                 ^
-            SyntaxError: invalid syntax
-        
-        Or other import failures::
-        
-            >>> from examples import bad_module
-            >>> try:
-            ...     bad_module()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[61]>", line 1, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[60]>", line 2, in <module>
-                bad_module()
-              File "...tests...examples.py", line 23, in bad_module
-                import badmodule
-              File "...tests...badmodule.py", line 3, in <module>
-                raise Exception("boom!")
-            Exception: boom!
-        
-        Or a traceback that's caused by exceeding the recursion limit (here we're
-        forcing the type and value to have consistency across platforms)::
-        
-            >>> def f(): f()
-            >>> try:
-            ...    f()
-            ... except RuntimeError:
-            ...    et, ev, tb = sys.exc_info()
-            ...    tb = Traceback(tb)
-            ...
-            >>> reraise(RuntimeError, RuntimeError("maximum recursion depth exceeded"), tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[32]>", line 1, in f
-                def f(): f()
-              File "<doctest README.rst[32]>", line 1, in f
-                def f(): f()
-              File "<doctest README.rst[32]>", line 1, in f
-                def f(): f()
-              ...
-            RuntimeError: maximum recursion depth exceeded
-        
-        Reference
-        ~~~~~~~~~
-        
-        tblib.Traceback
-        ---------------
-        
-        It is used by the ``pickling_support``. You can use it too if you want more flexibility::
-        
-            >>> from tblib import Traceback
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[21]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[21]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        tblib.Traceback.to_dict
-        ```````````````````````
-        
-        You can use the ``to_dict`` method and the ``from_dict`` classmethod to
-        convert a Traceback into and from a dictionary serializable by the stdlib
-        json.JSONDecoder::
-        
-            >>> import json
-            >>> from pprint import pprint
-            >>> try:
-            ...     inner_2()
-            ... except:
-            ...     et, ev, tb = sys.exc_info()
-            ...     tb = Traceback(tb)
-            ...     tb_dict = tb.to_dict()
-            ...     pprint(tb_dict)
-            {'tb_frame': {'f_code': {'co_filename': '<doctest README.rst[...]>',
-                                     'co_name': '<module>'},
-                          'f_globals': {'__name__': '__main__'},
-                          'f_lineno': 5},
-             'tb_lineno': 2,
-             'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
-                                                 'co_name': 'inner_2'},
-                                      'f_globals': {'__name__': '__main__'},
-                                      'f_lineno': 2},
-                         'tb_lineno': 2,
-                         'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
-                                                             'co_name': 'inner_1'},
-                                                  'f_globals': {'__name__': '__main__'},
-                                                  'f_lineno': 2},
-                                     'tb_lineno': 2,
-                                     'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
-                                                                         'co_name': 'inner_0'},
-                                                              'f_globals': {'__name__': '__main__'},
-                                                              'f_lineno': 2},
-                                                 'tb_lineno': 2,
-                                                 'tb_next': None}}}}
-        
-        tblib.Traceback.from_dict
-        `````````````````````````
-        
-        Building on the previous example::
-        
-            >>> tb_json = json.dumps(tb_dict)
-            >>> tb = Traceback.from_dict(json.loads(tb_json))
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[21]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "<doctest README.rst[21]>", line 2, in <module>
-                inner_2()
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        tblib.Traceback.from_string
-        ```````````````````````````
-        
-        ::
-        
-            >>> tb = Traceback.from_string("""
-            ... File "skipped.py", line 123, in func_123
-            ... Traceback (most recent call last):
-            ...   File "tests/examples.py", line 2, in func_a
-            ...     func_b()
-            ...   File "tests/examples.py", line 6, in func_b
-            ...     func_c()
-            ...   File "tests/examples.py", line 10, in func_c
-            ...     func_d()
-            ...   File "tests/examples.py", line 14, in func_d
-            ... Doesn't: matter
-            ... """)
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[42]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "...examples.py", line 2, in func_a
-                func_b()
-              File "...examples.py", line 6, in func_b
-                func_c()
-              File "...examples.py", line 10, in func_c
-                func_d()
-              File "...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: fail
-        
-        
-        If you use the ``strict=False`` option then parsing is a bit more lax::
-        
-            >>> tb = Traceback.from_string("""
-            ... File "bogus.py", line 123, in bogus
-            ... Traceback (most recent call last):
-            ...  File "tests/examples.py", line 2, in func_a
-            ...   func_b()
-            ...    File "tests/examples.py", line 6, in func_b
-            ...     func_c()
-            ...    File "tests/examples.py", line 10, in func_c
-            ...   func_d()
-            ...  File "tests/examples.py", line 14, in func_d
-            ... Doesn't: matter
-            ... """, strict=False)
-            >>> reraise(et, ev, tb.as_traceback())
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[42]>", line 6, in <module>
-                reraise(et, ev, tb.as_traceback())
-              File "bogus.py", line 123, in bogus
-              File "...examples.py", line 2, in func_a
-                func_b()
-              File "...examples.py", line 6, in func_b
-                func_c()
-              File "...examples.py", line 10, in func_c
-                func_d()
-              File "...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: fail
-        
-        tblib.decorators.return_error
-        -----------------------------
-        
-        ::
-        
-            >>> from tblib.decorators import return_error
-            >>> inner_2r = return_error(inner_2)
-            >>> e = inner_2r()
-            >>> e
-            <tblib.decorators.Error object at ...>
-            >>> e.reraise()
-            Traceback (most recent call last):
-              ...
-              File "<doctest README.rst[26]>", line 1, in <module>
-                e.reraise()
-              File "...tblib...decorators.py", line 19, in reraise
-                reraise(self.exc_type, self.exc_value, self.traceback)
-              File "...tblib...decorators.py", line 25, in return_exceptions_wrapper
-                return func(*args, **kwargs)
-              File "<doctest README.rst[5]>", line 2, in inner_2
-                inner_1()
-              File "<doctest README.rst[4]>", line 2, in inner_1
-                inner_0()
-              File "<doctest README.rst[3]>", line 2, in inner_0
-                raise Exception('fail')
-            Exception: fail
-        
-        How's this useful? Imagine you're using multiprocessing like this::
-        
-            # Note that Python 3.4 and later will show the remote traceback (but as a string sadly) so we skip testing this.
-            >>> import traceback
-            >>> from multiprocessing import Pool
-            >>> from examples import func_a
-            >>> pool = Pool()  # doctest: +SKIP
-            >>> try:  # doctest: +SKIP
-            ...     for i in pool.map(func_a, range(5)):
-            ...         print(i)
-            ... except:
-            ...     print(traceback.format_exc())
-            ...
-            Traceback (most recent call last):
-              File "<doctest README.rst[...]>", line 2, in <module>
-                for i in pool.map(func_a, range(5)):
-              File "...multiprocessing...pool.py", line ..., in map
-                ...
-              File "...multiprocessing...pool.py", line ..., in get
-                ...
-            Exception: Guessing time !
-            <BLANKLINE>
-            >>> pool.terminate()  # doctest: +SKIP
-        
-        Not very useful is it? Let's sort this out::
-        
-            >>> from tblib.decorators import apply_with_return_error, Error
-            >>> from itertools import repeat
-            >>> pool = Pool()
-            >>> try:
-            ...     for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
-            ...         if isinstance(i, Error):
-            ...             i.reraise()
-            ...         else:
-            ...             print(i)
-            ... except:
-            ...     print(traceback.format_exc())
-            ...
-            Traceback (most recent call last):
-              File "<doctest README.rst[...]>", line 4, in <module>
-                i.reraise()
-              File "...tblib...decorators.py", line ..., in reraise
-                reraise(self.exc_type, self.exc_value, self.traceback)
-              File "...tblib...decorators.py", line ..., in return_exceptions_wrapper
-                return func(*args, **kwargs)
-              File "...tblib...decorators.py", line ..., in apply_with_return_error
-                return args[0](*args[1:])
-              File "...examples.py", line 2, in func_a
-                func_b()
-              File "...examples.py", line 6, in func_b
-                func_c()
-              File "...examples.py", line 10, in func_c
-                func_d()
-              File "...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: Guessing time !
-            <BLANKLINE>
-            >>> pool.terminate()
-        
-        Much better !
-        
-        What if we have a local call stack ?
-        ````````````````````````````````````
-        
-        ::
-        
-            >>> def local_0():
-            ...     pool = Pool()
-            ...     try:
-            ...         for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
-            ...             if isinstance(i, Error):
-            ...                 i.reraise()
-            ...             else:
-            ...                 print(i)
-            ...     finally:
-            ...         pool.close()
-            ...
-            >>> def local_1():
-            ...     local_0()
-            ...
-            >>> def local_2():
-            ...     local_1()
-            ...
-            >>> try:
-            ...     local_2()
-            ... except:
-            ...     print(traceback.format_exc())
-            Traceback (most recent call last):
-              File "<doctest README.rst[...]>", line 2, in <module>
-                local_2()
-              File "<doctest README.rst[...]>", line 2, in local_2
-                local_1()
-              File "<doctest README.rst[...]>", line 2, in local_1
-                local_0()
-              File "<doctest README.rst[...]>", line 6, in local_0
-                i.reraise()
-              File "...tblib...decorators.py", line 20, in reraise
-                reraise(self.exc_type, self.exc_value, self.traceback)
-              File "...tblib...decorators.py", line 27, in return_exceptions_wrapper
-                return func(*args, **kwargs)
-              File "...tblib...decorators.py", line 47, in apply_with_return_error
-                return args[0](*args[1:])
-              File "...tests...examples.py", line 2, in func_a
-                func_b()
-              File "...tests...examples.py", line 6, in func_b
-                func_c()
-              File "...tests...examples.py", line 10, in func_c
-                func_d()
-              File "...tests...examples.py", line 14, in func_d
-                raise Exception("Guessing time !")
-            Exception: Guessing time !
-            <BLANKLINE>
-        
-        Other weird stuff
-        `````````````````
-        
-        Clearing traceback works (Python 3.4 and up)::
-        
-            >>> tb = Traceback.from_string("""
-            ... File "skipped.py", line 123, in func_123
-            ... Traceback (most recent call last):
-            ...   File "tests/examples.py", line 2, in func_a
-            ...     func_b()
-            ...   File "tests/examples.py", line 6, in func_b
-            ...     func_c()
-            ...   File "tests/examples.py", line 10, in func_c
-            ...     func_d()
-            ...   File "tests/examples.py", line 14, in func_d
-            ... Doesn't: matter
-            ... """)
-            >>> import traceback, sys
-            >>> if sys.version_info > (3, 4):
-            ...     traceback.clear_frames(tb)
-        
-        Credits
-        =======
-        
-        * `mitsuhiko/jinja2 <https://github.com/mitsuhiko/jinja2>`_ for figuring a way to create traceback objects.
-        
-        
-        Changelog
-        =========
-        
-        1.7.0 (2020-07-24)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Add more attributes to ``Frame`` and ``Code`` objects for pytest compatibility. Contributed by Ivanq in
-          `#58 <https://github.com/ionelmc/python-tblib/pull/58>`_.
-        
-        1.6.0 (2019-12-07)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * When pickling an Exception, also pickle its traceback and the Exception chain
-          (``raise ... from ...``). Contributed by Guido Imperiale in
-          `#53 <https://github.com/ionelmc/python-tblib/issues/53>`_.
-        
-        1.5.0 (2019-10-23)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added support for Python 3.8. Contributed by Victor Stinner in
-          `#42 <https://github.com/ionelmc/python-tblib/issues/42>`_.
-        * Removed support for end of life Python 3.4.
-        * Few CI improvements and fixes.
-        
-        1.4.0 (2019-05-02)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Removed support for end of life Python 3.3.
-        * Fixed tests for Python 3.7. Contributed by Elliott Sales de Andrade in
-          `#36 <https://github.com/ionelmc/python-tblib/issues/36>`_.
-        * Fixed compatibility issue with Twised (``twisted.python.failure.Failure`` expected a ``co_code`` attribute).
-        
-        1.3.2 (2017-04-09)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Add support for PyPy3.5-5.7.1-beta. Previously ``AttributeError:
-          'Frame' object has no attribute 'clear'``  could be raised. See PyPy
-          issue `#2532 <https://bitbucket.org/pypy/pypy/issues/2532/pypy3-attributeerror-frame-object-has-no>`_.
-        
-        1.3.1 (2017-03-27)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Fixed handling for tracebacks due to exceeding the recursion limit.
-          Fixes `#15 <https://github.com/ionelmc/python-tblib/issues/15>`_.
-        
-        1.3.0 (2016-03-08)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added ``Traceback.from_string``.
-        
-        1.2.0 (2015-12-18)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Fixed handling for tracebacks from generators and other internal improvements
-          and optimizations. Contributed by DRayX in `#10 <https://github.com/ionelmc/python-tblib/issues/10>`_
-          and `#11 <https://github.com/ionelmc/python-tblib/pull/11>`_.
-        
-        1.1.0 (2015-07-27)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added support for Python 2.6. Contributed by Arcadiy Ivanov in
-          `#8 <https://github.com/ionelmc/python-tblib/pull/8>`_.
-        
-        1.0.0 (2015-03-30)
-        ~~~~~~~~~~~~~~~~~~
-        
-        * Added ``to_dict`` method and ``from_dict`` classmethod on Tracebacks.
-          Contributed by beckjake in `#5 <https://github.com/ionelmc/python-tblib/pull/5>`_.
-        
 Keywords: traceback,debugging,exceptions
-Platform: UNKNOWN
 Classifier: Development Status :: 5 - Production/Stable
 Classifier: Intended Audience :: Developers
 Classifier: License :: OSI Approved :: BSD License
@@ -748,13 +17,752 @@ Classifier: Operating System :: Unix
 Classifier: Operating System :: POSIX
 Classifier: Operating System :: Microsoft :: Windows
 Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2.7
 Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3 :: Only
 Classifier: Programming Language :: Python :: 3.7
 Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
 Classifier: Programming Language :: Python :: Implementation :: CPython
 Classifier: Programming Language :: Python :: Implementation :: PyPy
 Classifier: Topic :: Utilities
-Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Requires-Python: >=3.7
+License-File: LICENSE
+License-File: AUTHORS.rst
+
+========
+Overview
+========
+
+
+
+Serialization library for Exceptions and Tracebacks.
+
+* Free software: BSD license
+
+It allows you to:
+
+* `Pickle <https://docs.python.org/3/library/pickle.html>`_ tracebacks and raise exceptions
+  with pickled tracebacks in different processes. This allows better error handling when running
+  code over multiple processes (imagine multiprocessing, billiard, futures, celery etc).
+* Create traceback objects from strings (the ``from_string`` method). *No pickling is used*.
+* Serialize tracebacks to/from plain dicts (the ``from_dict`` and ``to_dict`` methods). *No pickling is used*.
+* Raise the tracebacks created from the aforementioned sources.
+* Pickle an Exception together with its traceback and exception chain
+  (``raise ... from ...``) *(Python 3 only)*
+
+**Again, note that using the pickle support is completely optional. You are solely responsible for
+security problems should you decide to use the pickle support.**
+
+Installation
+============
+
+::
+
+    pip install tblib
+
+Documentation
+=============
+
+.. contents::
+   :local:
+
+Pickling tracebacks
+~~~~~~~~~~~~~~~~~~~
+
+**Note**: The traceback objects that come out are stripped of some attributes (like variables). But you'll be able to raise exceptions with
+those tracebacks or print them - that should cover 99% of the usecases.
+
+::
+
+    >>> from tblib import pickling_support
+    >>> pickling_support.install()
+    >>> import pickle, sys
+    >>> def inner_0():
+    ...     raise Exception('fail')
+    ...
+    >>> def inner_1():
+    ...     inner_0()
+    ...
+    >>> def inner_2():
+    ...     inner_1()
+    ...
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     s1 = pickle.dumps(sys.exc_info())
+    ...
+    >>> len(s1) > 1
+    True
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     s2 = pickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
+    ...
+    >>> len(s2) > 1
+    True
+
+    >>> try:
+    ...     import cPickle
+    ... except ImportError:
+    ...     import pickle as cPickle
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     s3 = cPickle.dumps(sys.exc_info(), protocol=pickle.HIGHEST_PROTOCOL)
+    ...
+    >>> len(s3) > 1
+    True
+
+Unpickling tracebacks
+~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    >>> pickle.loads(s1)
+    (<...Exception'>, Exception('fail'...), <traceback object at ...>)
+
+    >>> pickle.loads(s2)
+    (<...Exception'>, Exception('fail'...), <traceback object at ...>)
+
+    >>> pickle.loads(s3)
+    (<...Exception'>, Exception('fail'...), <traceback object at ...>)
+
+Raising
+~~~~~~~
+
+::
+
+    >>> from six import reraise
+    >>> reraise(*pickle.loads(s1))
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[14]>", line 1, in <module>
+        reraise(*pickle.loads(s2))
+      File "<doctest README.rst[8]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+    >>> reraise(*pickle.loads(s2))
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[14]>", line 1, in <module>
+        reraise(*pickle.loads(s2))
+      File "<doctest README.rst[8]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+    >>> reraise(*pickle.loads(s3))
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[14]>", line 1, in <module>
+        reraise(*pickle.loads(s2))
+      File "<doctest README.rst[8]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+Pickling Exceptions together with their traceback and chain (Python 3 only)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    >>> try:  # doctest: +SKIP
+    ...     try:
+    ...         1 / 0
+    ...     except Exception as e:
+    ...         raise Exception("foo") from e
+    ... except Exception as e:
+    ...     s = pickle.dumps(e)
+    >>> raise pickle.loads(s)  # doctest: +SKIP
+    Traceback (most recent call last):
+      File "<doctest README.rst[16]>", line 3, in <module>
+        1 / 0
+    ZeroDivisionError: division by zero
+
+    The above exception was the direct cause of the following exception:
+
+    Traceback (most recent call last):
+      File "<doctest README.rst[17]>", line 1, in <module>
+        raise pickle.loads(s)
+      File "<doctest README.rst[16]>", line 5, in <module>
+        raise Exception("foo") from e
+    Exception: foo
+
+BaseException subclasses defined after calling ``pickling_support.install()`` will
+**not** retain their traceback and exception chain pickling.
+To cover custom Exceptions, there are three options:
+
+1. Use ``@pickling_support.install`` as a decorator for each custom Exception
+
+    .. code-block:: python
+
+        >>> from tblib import pickling_support
+        >>> # Declare all imports of your package's dependencies
+        >>> import numpy  # doctest: +SKIP
+
+        >>> pickling_support.install()  # install for all modules imported so far
+
+        >>> @pickling_support.install
+        ... class CustomError(Exception):
+        ...     pass
+
+   Eventual subclasses of ``CustomError`` will need to be decorated again.
+
+2. Invoke ``pickling_support.install()`` after all modules have been imported and all
+   Exception subclasses have been declared
+
+    .. code-block:: python
+
+        >>> # Declare all imports of your package's dependencies
+        >>> import numpy  # doctest: +SKIP
+        >>> from tblib import pickling_support
+
+        >>> # Declare your own custom Exceptions
+        >>> class CustomError(Exception):
+        ...     pass
+
+        >>> # Finally, install tblib
+        >>> pickling_support.install()
+
+3. Selectively install tblib for Exception instances just before they are pickled
+
+    .. code-block:: python
+
+       pickling_support.install(<Exception instance>, [Exception instance], ...)
+
+   The above will install tblib pickling for all listed exceptions as well as any other
+   exceptions in their exception chains.
+
+   For example, one could write a wrapper to be used with
+   `ProcessPoolExecutor <https://docs.python.org/3/library/concurrent.futures.html>`_,
+   `Dask.distributed <https://distributed.dask.org/>`_, or similar libraries:
+
+::
+
+    >>> from tblib import pickling_support
+    >>> def wrapper(func, *args, **kwargs):
+    ...     try:
+    ...         return func(*args, **kwargs)
+    ...     except Exception as e:
+    ...         pickling_support.install(e)
+    ...         raise
+
+What if we have a local stack, does it show correctly ?
+-------------------------------------------------------
+
+Yes it does::
+
+    >>> exc_info = pickle.loads(s3)
+    >>> def local_0():
+    ...     reraise(*exc_info)
+    ...
+    >>> def local_1():
+    ...     local_0()
+    ...
+    >>> def local_2():
+    ...     local_1()
+    ...
+    >>> local_2()
+    Traceback (most recent call last):
+      File "...doctest.py", line ..., in __run
+        compileflags, 1) in test.globs
+      File "<doctest README.rst[24]>", line 1, in <module>
+        local_2()
+      File "<doctest README.rst[23]>", line 2, in local_2
+        local_1()
+      File "<doctest README.rst[22]>", line 2, in local_1
+        local_0()
+      File "<doctest README.rst[21]>", line 2, in local_0
+        reraise(*exc_info)
+      File "<doctest README.rst[11]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+It also supports more contrived scenarios
+-----------------------------------------
+
+Like tracebacks with syntax errors::
+
+    >>> from tblib import Traceback
+    >>> from examples import bad_syntax
+    >>> try:
+    ...     bad_syntax()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[58]>", line 1, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[57]>", line 2, in <module>
+        bad_syntax()
+      File "...tests...examples.py", line 18, in bad_syntax
+        import badsyntax
+      File "...tests...badsyntax.py", line 5
+        is very bad
+         ^
+    SyntaxError: invalid syntax
+
+Or other import failures::
+
+    >>> from examples import bad_module
+    >>> try:
+    ...     bad_module()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[61]>", line 1, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[60]>", line 2, in <module>
+        bad_module()
+      File "...tests...examples.py", line 23, in bad_module
+        import badmodule
+      File "...tests...badmodule.py", line 3, in <module>
+        raise Exception("boom!")
+    Exception: boom!
+
+Or a traceback that's caused by exceeding the recursion limit (here we're
+forcing the type and value to have consistency across platforms)::
+
+    >>> def f(): f()
+    >>> try:
+    ...    f()
+    ... except RuntimeError:
+    ...    et, ev, tb = sys.exc_info()
+    ...    tb = Traceback(tb)
+    ...
+    >>> reraise(RuntimeError, RuntimeError("maximum recursion depth exceeded"), tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[32]>", line 1, in f
+        def f(): f()
+      File "<doctest README.rst[32]>", line 1, in f
+        def f(): f()
+      File "<doctest README.rst[32]>", line 1, in f
+        def f(): f()
+      ...
+    RuntimeError: maximum recursion depth exceeded
+
+Reference
+~~~~~~~~~
+
+tblib.Traceback
+---------------
+
+It is used by the ``pickling_support``. You can use it too if you want more flexibility::
+
+    >>> from tblib import Traceback
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[21]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[21]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+tblib.Traceback.to_dict
+```````````````````````
+
+You can use the ``to_dict`` method and the ``from_dict`` classmethod to
+convert a Traceback into and from a dictionary serializable by the stdlib
+json.JSONDecoder::
+
+    >>> import json
+    >>> from pprint import pprint
+    >>> try:
+    ...     inner_2()
+    ... except:
+    ...     et, ev, tb = sys.exc_info()
+    ...     tb = Traceback(tb)
+    ...     tb_dict = tb.to_dict()
+    ...     pprint(tb_dict)
+    {'tb_frame': {'f_code': {'co_filename': '<doctest README.rst[...]>',
+                             'co_name': '<module>'},
+                  'f_globals': {'__name__': '__main__'},
+                  'f_lineno': 5},
+     'tb_lineno': 2,
+     'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
+                                         'co_name': 'inner_2'},
+                              'f_globals': {'__name__': '__main__'},
+                              'f_lineno': 2},
+                 'tb_lineno': 2,
+                 'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
+                                                     'co_name': 'inner_1'},
+                                          'f_globals': {'__name__': '__main__'},
+                                          'f_lineno': 2},
+                             'tb_lineno': 2,
+                             'tb_next': {'tb_frame': {'f_code': {'co_filename': ...,
+                                                                 'co_name': 'inner_0'},
+                                                      'f_globals': {'__name__': '__main__'},
+                                                      'f_lineno': 2},
+                                         'tb_lineno': 2,
+                                         'tb_next': None}}}}
+
+tblib.Traceback.from_dict
+`````````````````````````
+
+Building on the previous example::
+
+    >>> tb_json = json.dumps(tb_dict)
+    >>> tb = Traceback.from_dict(json.loads(tb_json))
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[21]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "<doctest README.rst[21]>", line 2, in <module>
+        inner_2()
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+tblib.Traceback.from_string
+```````````````````````````
+
+::
+
+    >>> tb = Traceback.from_string("""
+    ... File "skipped.py", line 123, in func_123
+    ... Traceback (most recent call last):
+    ...   File "tests/examples.py", line 2, in func_a
+    ...     func_b()
+    ...   File "tests/examples.py", line 6, in func_b
+    ...     func_c()
+    ...   File "tests/examples.py", line 10, in func_c
+    ...     func_d()
+    ...   File "tests/examples.py", line 14, in func_d
+    ... Doesn't: matter
+    ... """)
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[42]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "...examples.py", line 2, in func_a
+        func_b()
+      File "...examples.py", line 6, in func_b
+        func_c()
+      File "...examples.py", line 10, in func_c
+        func_d()
+      File "...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: fail
+
+
+If you use the ``strict=False`` option then parsing is a bit more lax::
+
+    >>> tb = Traceback.from_string("""
+    ... File "bogus.py", line 123, in bogus
+    ... Traceback (most recent call last):
+    ...  File "tests/examples.py", line 2, in func_a
+    ...   func_b()
+    ...    File "tests/examples.py", line 6, in func_b
+    ...     func_c()
+    ...    File "tests/examples.py", line 10, in func_c
+    ...   func_d()
+    ...  File "tests/examples.py", line 14, in func_d
+    ... Doesn't: matter
+    ... """, strict=False)
+    >>> reraise(et, ev, tb.as_traceback())
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[42]>", line 6, in <module>
+        reraise(et, ev, tb.as_traceback())
+      File "bogus.py", line 123, in bogus
+      File "...examples.py", line 2, in func_a
+        func_b()
+      File "...examples.py", line 6, in func_b
+        func_c()
+      File "...examples.py", line 10, in func_c
+        func_d()
+      File "...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: fail
+
+tblib.decorators.return_error
+-----------------------------
+
+::
+
+    >>> from tblib.decorators import return_error
+    >>> inner_2r = return_error(inner_2)
+    >>> e = inner_2r()
+    >>> e
+    <tblib.decorators.Error object at ...>
+    >>> e.reraise()
+    Traceback (most recent call last):
+      ...
+      File "<doctest README.rst[26]>", line 1, in <module>
+        e.reraise()
+      File "...tblib...decorators.py", line 19, in reraise
+        reraise(self.exc_type, self.exc_value, self.traceback)
+      File "...tblib...decorators.py", line 25, in return_exceptions_wrapper
+        return func(*args, **kwargs)
+      File "<doctest README.rst[5]>", line 2, in inner_2
+        inner_1()
+      File "<doctest README.rst[4]>", line 2, in inner_1
+        inner_0()
+      File "<doctest README.rst[3]>", line 2, in inner_0
+        raise Exception('fail')
+    Exception: fail
+
+How's this useful? Imagine you're using multiprocessing like this::
+
+    # Note that Python 3.4 and later will show the remote traceback (but as a string sadly) so we skip testing this.
+    >>> import traceback
+    >>> from multiprocessing import Pool
+    >>> from examples import func_a
+    >>> pool = Pool()  # doctest: +SKIP
+    >>> try:  # doctest: +SKIP
+    ...     for i in pool.map(func_a, range(5)):
+    ...         print(i)
+    ... except:
+    ...     print(traceback.format_exc())
+    ...
+    Traceback (most recent call last):
+      File "<doctest README.rst[...]>", line 2, in <module>
+        for i in pool.map(func_a, range(5)):
+      File "...multiprocessing...pool.py", line ..., in map
+        ...
+      File "...multiprocessing...pool.py", line ..., in get
+        ...
+    Exception: Guessing time !
+    <BLANKLINE>
+    >>> pool.terminate()  # doctest: +SKIP
+
+Not very useful is it? Let's sort this out::
+
+    >>> from tblib.decorators import apply_with_return_error, Error
+    >>> from itertools import repeat
+    >>> pool = Pool()
+    >>> try:
+    ...     for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
+    ...         if isinstance(i, Error):
+    ...             i.reraise()
+    ...         else:
+    ...             print(i)
+    ... except:
+    ...     print(traceback.format_exc())
+    ...
+    Traceback (most recent call last):
+      File "<doctest README.rst[...]>", line 4, in <module>
+        i.reraise()
+      File "...tblib...decorators.py", line ..., in reraise
+        reraise(self.exc_type, self.exc_value, self.traceback)
+      File "...tblib...decorators.py", line ..., in return_exceptions_wrapper
+        return func(*args, **kwargs)
+      File "...tblib...decorators.py", line ..., in apply_with_return_error
+        return args[0](*args[1:])
+      File "...examples.py", line 2, in func_a
+        func_b()
+      File "...examples.py", line 6, in func_b
+        func_c()
+      File "...examples.py", line 10, in func_c
+        func_d()
+      File "...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: Guessing time !
+    <BLANKLINE>
+    >>> pool.terminate()
+
+Much better !
+
+What if we have a local call stack ?
+````````````````````````````````````
+
+::
+
+    >>> def local_0():
+    ...     pool = Pool()
+    ...     try:
+    ...         for i in pool.map(apply_with_return_error, zip(repeat(func_a), range(5))):
+    ...             if isinstance(i, Error):
+    ...                 i.reraise()
+    ...             else:
+    ...                 print(i)
+    ...     finally:
+    ...         pool.close()
+    ...
+    >>> def local_1():
+    ...     local_0()
+    ...
+    >>> def local_2():
+    ...     local_1()
+    ...
+    >>> try:
+    ...     local_2()
+    ... except:
+    ...     print(traceback.format_exc())
+    Traceback (most recent call last):
+      File "<doctest README.rst[...]>", line 2, in <module>
+        local_2()
+      File "<doctest README.rst[...]>", line 2, in local_2
+        local_1()
+      File "<doctest README.rst[...]>", line 2, in local_1
+        local_0()
+      File "<doctest README.rst[...]>", line 6, in local_0
+        i.reraise()
+      File "...tblib...decorators.py", line 20, in reraise
+        reraise(self.exc_type, self.exc_value, self.traceback)
+      File "...tblib...decorators.py", line 27, in return_exceptions_wrapper
+        return func(*args, **kwargs)
+      File "...tblib...decorators.py", line 47, in apply_with_return_error
+        return args[0](*args[1:])
+      File "...tests...examples.py", line 2, in func_a
+        func_b()
+      File "...tests...examples.py", line 6, in func_b
+        func_c()
+      File "...tests...examples.py", line 10, in func_c
+        func_d()
+      File "...tests...examples.py", line 14, in func_d
+        raise Exception("Guessing time !")
+    Exception: Guessing time !
+    <BLANKLINE>
+
+Other weird stuff
+`````````````````
+
+Clearing traceback works (Python 3.4 and up)::
+
+    >>> tb = Traceback.from_string("""
+    ... File "skipped.py", line 123, in func_123
+    ... Traceback (most recent call last):
+    ...   File "tests/examples.py", line 2, in func_a
+    ...     func_b()
+    ...   File "tests/examples.py", line 6, in func_b
+    ...     func_c()
+    ...   File "tests/examples.py", line 10, in func_c
+    ...     func_d()
+    ...   File "tests/examples.py", line 14, in func_d
+    ... Doesn't: matter
+    ... """)
+    >>> import traceback, sys
+    >>> if sys.version_info > (3, 4):
+    ...     traceback.clear_frames(tb)
+
+Credits
+=======
+
+* `mitsuhiko/jinja2 <https://github.com/mitsuhiko/jinja2>`_ for figuring a way to create traceback objects.
+
+
+Changelog
+=========
+
+2.0.0 (2023-06-22)
+~~~~~~~~~~~~~~~~~~
+
+* Removed support for legacy Pythons (2.7 and 3.6) and added Python 3.11 in the test grid.
+* Some cleanups and refactors (mostly from ruff).
+
+1.7.0 (2020-07-24)
+~~~~~~~~~~~~~~~~~~
+
+* Add more attributes to ``Frame`` and ``Code`` objects for pytest compatibility. Contributed by Ivanq in
+  `#58 <https://github.com/ionelmc/python-tblib/pull/58>`_.
+
+1.6.0 (2019-12-07)
+~~~~~~~~~~~~~~~~~~
+
+* When pickling an Exception, also pickle its traceback and the Exception chain
+  (``raise ... from ...``). Contributed by Guido Imperiale in
+  `#53 <https://github.com/ionelmc/python-tblib/issues/53>`_.
+
+1.5.0 (2019-10-23)
+~~~~~~~~~~~~~~~~~~
+
+* Added support for Python 3.8. Contributed by Victor Stinner in
+  `#42 <https://github.com/ionelmc/python-tblib/issues/42>`_.
+* Removed support for end of life Python 3.4.
+* Few CI improvements and fixes.
+
+1.4.0 (2019-05-02)
+~~~~~~~~~~~~~~~~~~
+
+* Removed support for end of life Python 3.3.
+* Fixed tests for Python 3.7. Contributed by Elliott Sales de Andrade in
+  `#36 <https://github.com/ionelmc/python-tblib/issues/36>`_.
+* Fixed compatibility issue with Twised (``twisted.python.failure.Failure`` expected a ``co_code`` attribute).
+
+1.3.2 (2017-04-09)
+~~~~~~~~~~~~~~~~~~
+
+* Add support for PyPy3.5-5.7.1-beta. Previously ``AttributeError:
+  'Frame' object has no attribute 'clear'``  could be raised. See PyPy
+  issue `#2532 <https://foss.heptapod.net/pypy/pypy/-/issues/2532>`_.
+
+1.3.1 (2017-03-27)
+~~~~~~~~~~~~~~~~~~
+
+* Fixed handling for tracebacks due to exceeding the recursion limit.
+  Fixes `#15 <https://github.com/ionelmc/python-tblib/issues/15>`_.
+
+1.3.0 (2016-03-08)
+~~~~~~~~~~~~~~~~~~
+
+* Added ``Traceback.from_string``.
+
+1.2.0 (2015-12-18)
+~~~~~~~~~~~~~~~~~~
+
+* Fixed handling for tracebacks from generators and other internal improvements
+  and optimizations. Contributed by DRayX in `#10 <https://github.com/ionelmc/python-tblib/issues/10>`_
+  and `#11 <https://github.com/ionelmc/python-tblib/pull/11>`_.
+
+1.1.0 (2015-07-27)
+~~~~~~~~~~~~~~~~~~
+
+* Added support for Python 2.6. Contributed by Arcadiy Ivanov in
+  `#8 <https://github.com/ionelmc/python-tblib/pull/8>`_.
+
+1.0.0 (2015-03-30)
+~~~~~~~~~~~~~~~~~~
+
+* Added ``to_dict`` method and ``from_dict`` classmethod on Tracebacks.
+  Contributed by beckjake in `#5 <https://github.com/ionelmc/python-tblib/pull/5>`_.
diff --git a/src/tblib.egg-info/SOURCES.txt b/src/tblib.egg-info/SOURCES.txt
index f5cb383..0570ca0 100644
--- a/src/tblib.egg-info/SOURCES.txt
+++ b/src/tblib.egg-info/SOURCES.txt
@@ -1,26 +1,24 @@
-.appveyor.yml
 .bumpversion.cfg
 .cookiecutterrc
 .coveragerc
 .editorconfig
 .gitignore
+.pre-commit-config.yaml
 .readthedocs.yml
-.travis.yml
 AUTHORS.rst
 CHANGELOG.rst
 CONTRIBUTING.rst
 LICENSE
 MANIFEST.in
 README.rst
-setup.cfg
+pyproject.toml
+pytest.ini
 setup.py
 tox.ini
-ci/appveyor-download.py
-ci/appveyor-with-compiler.cmd
+.github/workflows/github-actions.yml
 ci/bootstrap.py
 ci/requirements.txt
-ci/templates/.appveyor.yml
-ci/templates/.travis.yml
+ci/templates/.github/workflows/github-actions.yml
 docs/authors.rst
 docs/changelog.rst
 docs/conf.py
@@ -32,7 +30,6 @@ docs/requirements.txt
 docs/spelling_wordlist.txt
 docs/usage.rst
 src/tblib/__init__.py
-src/tblib/cpython.py
 src/tblib/decorators.py
 src/tblib/pickling_support.py
 src/tblib.egg-info/PKG-INFO
diff --git a/src/tblib/__init__.py b/src/tblib/__init__.py
index 7e717b4..a9b1084 100644
--- a/src/tblib/__init__.py
+++ b/src/tblib/__init__.py
@@ -1,25 +1,10 @@
 import re
 import sys
 from types import CodeType
-from types import FrameType
-from types import TracebackType
-
-try:
-    from __pypy__ import tproxy
-except ImportError:
-    tproxy = None
-try:
-    from .cpython import tb_set_next
-except ImportError:
-    tb_set_next = None
-
-if not tb_set_next and not tproxy:
-    raise ImportError("Cannot use tblib. Runtime not supported.")
-
-__version__ = '1.7.0'
+
+__version__ = '2.0.0'
 __all__ = 'Traceback', 'TracebackParseError', 'Frame', 'Code'
 
-PY3 = sys.version_info[0] == 3
 FRAME_RE = re.compile(r'^\s*File "(?P<co_filename>.+)", line (?P<tb_lineno>\d+)(, in (?P<co_name>.+))?$')
 
 
@@ -30,7 +15,7 @@ class _AttrDict(dict):
         try:
             return self[name]
         except KeyError:
-            raise AttributeError(name)
+            raise AttributeError(name) from None
 
 
 # noinspection PyPep8Naming
@@ -42,10 +27,11 @@ class TracebackParseError(Exception):
     pass
 
 
-class Code(object):
+class Code:
     """
     Class that replicates just enough of the builtin Code object to enable serialization and traceback rendering.
     """
+
     co_code = None
 
     def __init__(self, code):
@@ -59,28 +45,15 @@ class Code(object):
         self.co_flags = 64
         self.co_firstlineno = 0
 
-    # noinspection SpellCheckingInspection
-    def __tproxy__(self, operation, *args, **kwargs):
-        """
-        Necessary for PyPy's tproxy.
-        """
-        if operation in ('__getattribute__', '__getattr__'):
-            return getattr(self, args[0])
-        else:
-            return getattr(self, operation)(*args, **kwargs)
-
 
-class Frame(object):
+class Frame:
     """
     Class that replicates just enough of the builtin Frame object to enable serialization and traceback rendering.
     """
+
     def __init__(self, frame):
         self.f_locals = {}
-        self.f_globals = {
-            k: v
-            for k, v in frame.f_globals.items()
-            if k in ("__file__", "__name__")
-        }
+        self.f_globals = {k: v for k, v in frame.f_globals.items() if k in ('__file__', '__name__')}
         self.f_code = Code(frame.f_code)
         self.f_lineno = frame.f_lineno
 
@@ -92,24 +65,12 @@ class Frame(object):
         in turn is called by unittest.TestCase.assertRaises
         """
 
-    # noinspection SpellCheckingInspection
-    def __tproxy__(self, operation, *args, **kwargs):
-        """
-        Necessary for PyPy's tproxy.
-        """
-        if operation in ('__getattribute__', '__getattr__'):
-            if args[0] == 'f_code':
-                return tproxy(CodeType, self.f_code.__tproxy__)
-            else:
-                return getattr(self, args[0])
-        else:
-            return getattr(self, operation)(*args, **kwargs)
-
 
-class Traceback(object):
+class Traceback:
     """
     Class that wraps builtin Traceback objects.
     """
+
     tb_next = None
 
     def __init__(self, tb):
@@ -133,48 +94,43 @@ class Traceback(object):
         """
         Convert to a builtin Traceback object that is usable for raising or rendering a stacktrace.
         """
-        if tproxy:
-            return tproxy(TracebackType, self.__tproxy__)
-        if not tb_set_next:
-            raise RuntimeError("Unsupported Python interpreter!")
-
         current = self
         top_tb = None
         tb = None
         while current:
             f_code = current.tb_frame.f_code
             code = compile('\n' * (current.tb_lineno - 1) + 'raise __traceback_maker', current.tb_frame.f_code.co_filename, 'exec')
-            if hasattr(code, "replace"):
+            if hasattr(code, 'replace'):
                 # Python 3.8 and newer
-                code = code.replace(co_argcount=0,
-                                    co_filename=f_code.co_filename, co_name=f_code.co_name,
-                                    co_freevars=(), co_cellvars=())
-            elif PY3:
-                code = CodeType(
-                    0, code.co_kwonlyargcount,
-                    code.co_nlocals, code.co_stacksize, code.co_flags,
-                    code.co_code, code.co_consts, code.co_names, code.co_varnames,
-                    f_code.co_filename, f_code.co_name,
-                    code.co_firstlineno, code.co_lnotab, (), ()
-                )
+                code = code.replace(co_argcount=0, co_filename=f_code.co_filename, co_name=f_code.co_name, co_freevars=(), co_cellvars=())
             else:
                 code = CodeType(
                     0,
-                    code.co_nlocals, code.co_stacksize, code.co_flags,
-                    code.co_code, code.co_consts, code.co_names, code.co_varnames,
-                    f_code.co_filename.encode(), f_code.co_name.encode(),
-                    code.co_firstlineno, code.co_lnotab, (), ()
+                    code.co_kwonlyargcount,
+                    code.co_nlocals,
+                    code.co_stacksize,
+                    code.co_flags,
+                    code.co_code,
+                    code.co_consts,
+                    code.co_names,
+                    code.co_varnames,
+                    f_code.co_filename,
+                    f_code.co_name,
+                    code.co_firstlineno,
+                    code.co_lnotab,
+                    (),
+                    (),
                 )
 
             # noinspection PyBroadException
             try:
-                exec(code, dict(current.tb_frame.f_globals), {})
+                exec(code, dict(current.tb_frame.f_globals), {})  # noqa: S102
             except Exception:
                 next_tb = sys.exc_info()[2].tb_next
                 if top_tb is None:
                     top_tb = next_tb
                 if tb is not None:
-                    tb_set_next(tb, next_tb)
+                    tb.tb_next = next_tb
                 tb = next_tb
                 del next_tb
 
@@ -184,22 +140,8 @@ class Traceback(object):
         finally:
             del top_tb
             del tb
-    to_traceback = as_traceback
 
-    # noinspection SpellCheckingInspection
-    def __tproxy__(self, operation, *args, **kwargs):
-        """
-        Necessary for PyPy's tproxy.
-        """
-        if operation in ('__getattribute__', '__getattr__'):
-            if args[0] == 'tb_next':
-                return self.tb_next and self.tb_next.as_traceback()
-            elif args[0] == 'tb_frame':
-                return tproxy(FrameType, self.tb_frame.__tproxy__)
-            else:
-                return getattr(self, args[0])
-        else:
-            return getattr(self, operation)(*args, **kwargs)
+    to_traceback = as_traceback
 
     def as_dict(self):
         """
@@ -225,6 +167,7 @@ class Traceback(object):
             'tb_lineno': self.tb_lineno,
             'tb_next': tb_next,
         }
+
     to_dict = as_dict
 
     @classmethod
@@ -294,4 +237,4 @@ class Traceback(object):
                 )
             return cls(previous)
         else:
-            raise TracebackParseError("Could not find any frames in %r." % string)
+            raise TracebackParseError('Could not find any frames in %r.' % string)
diff --git a/src/tblib/cpython.py b/src/tblib/cpython.py
deleted file mode 100644
index 5c4bf20..0000000
--- a/src/tblib/cpython.py
+++ /dev/null
@@ -1,80 +0,0 @@
-"""
-Taken verbatim from Jinja2.
-
-https://github.com/mitsuhiko/jinja2/blob/master/jinja2/debug.py#L267
-"""
-import platform
-import sys
-
-
-def _init_ugly_crap():
-    """This function implements a few ugly things so that we can patch the
-    traceback objects.  The function returned allows resetting `tb_next` on
-    any python traceback object.  Do not attempt to use this on non cpython
-    interpreters
-    """
-    import ctypes
-    from types import TracebackType
-
-    # figure out side of _Py_ssize_t
-    if hasattr(ctypes.pythonapi, 'Py_InitModule4_64'):
-        _Py_ssize_t = ctypes.c_int64
-    else:
-        _Py_ssize_t = ctypes.c_int
-
-    # regular python
-    class _PyObject(ctypes.Structure):
-        pass
-
-    _PyObject._fields_ = [
-        ('ob_refcnt', _Py_ssize_t),
-        ('ob_type', ctypes.POINTER(_PyObject))
-    ]
-
-    # python with trace
-    if hasattr(sys, 'getobjects'):
-        class _PyObject(ctypes.Structure):
-            pass
-
-        _PyObject._fields_ = [
-            ('_ob_next', ctypes.POINTER(_PyObject)),
-            ('_ob_prev', ctypes.POINTER(_PyObject)),
-            ('ob_refcnt', _Py_ssize_t),
-            ('ob_type', ctypes.POINTER(_PyObject))
-        ]
-
-    class _Traceback(_PyObject):
-        pass
-
-    _Traceback._fields_ = [
-        ('tb_next', ctypes.POINTER(_Traceback)),
-        ('tb_frame', ctypes.POINTER(_PyObject)),
-        ('tb_lasti', ctypes.c_int),
-        ('tb_lineno', ctypes.c_int)
-    ]
-
-    def tb_set_next(tb, next):
-        """Set the tb_next attribute of a traceback object."""
-        if not (isinstance(tb, TracebackType) and (next is None or isinstance(next, TracebackType))):
-            raise TypeError('tb_set_next arguments must be traceback objects')
-        obj = _Traceback.from_address(id(tb))
-        if tb.tb_next is not None:
-            old = _Traceback.from_address(id(tb.tb_next))
-            old.ob_refcnt -= 1
-        if next is None:
-            obj.tb_next = ctypes.POINTER(_Traceback)()
-        else:
-            next = _Traceback.from_address(id(next))
-            next.ob_refcnt += 1
-            obj.tb_next = ctypes.pointer(next)
-
-    return tb_set_next
-
-
-tb_set_next = None
-try:
-    if platform.python_implementation() == 'CPython':
-        tb_set_next = _init_ugly_crap()
-except Exception as exc:
-    sys.stderr.write("Failed to initialize cpython support: {!r}".format(exc))
-del _init_ugly_crap
diff --git a/src/tblib/decorators.py b/src/tblib/decorators.py
index 29fdef2..38d0675 100644
--- a/src/tblib/decorators.py
+++ b/src/tblib/decorators.py
@@ -6,7 +6,7 @@ from six import reraise
 from . import Traceback
 
 
-class Error(object):
+class Error:
     def __init__(self, exc_type, exc_value, traceback):
         self.exc_type = exc_type
         self.exc_value = exc_value
diff --git a/src/tblib/pickling_support.py b/src/tblib/pickling_support.py
index cf6e390..d58799f 100644
--- a/src/tblib/pickling_support.py
+++ b/src/tblib/pickling_support.py
@@ -39,8 +39,9 @@ def pickle_exception(obj):
     # still be pickled with protocol 5 if pickle.dump() is running with it.
     rv = obj.__reduce_ex__(3)
     if isinstance(rv, str):
-        raise TypeError("str __reduce__ output is not supported")
-    assert isinstance(rv, tuple) and len(rv) >= 2
+        raise TypeError('str __reduce__ output is not supported')
+    assert isinstance(rv, tuple)
+    assert len(rv) >= 2
 
     return (unpickle_exception, rv[:2] + (obj.__cause__, obj.__traceback__)) + rv[2:]
 
@@ -81,7 +82,4 @@ def install(*exc_classes_or_instances):
             if len(exc_classes_or_instances) == 1:
                 return exc
         else:
-            raise TypeError(
-                "Expected subclasses or instances of BaseException, got %s"
-                % (type(exc))
-            )
+            raise TypeError('Expected subclasses or instances of BaseException, got %s' % (type(exc)))
diff --git a/tests/badmodule.py b/tests/badmodule.py
index 86611f9..4915f00 100644
--- a/tests/badmodule.py
+++ b/tests/badmodule.py
@@ -1,3 +1,3 @@
 a = 1
 b = 2
-raise Exception("boom!")
+raise Exception('boom!')
diff --git a/tests/examples.py b/tests/examples.py
index d4e64ab..bb61d8c 100644
--- a/tests/examples.py
+++ b/tests/examples.py
@@ -11,14 +11,16 @@ def func_c():
 
 
 def func_d():
-    raise Exception("Guessing time !")
+    raise Exception('Guessing time !')
 
 
 def bad_syntax():
     import badsyntax
-    badsyntax
+
+    badsyntax()
 
 
 def bad_module():
     import badmodule
-    badmodule
+
+    badmodule()
diff --git a/tests/test_issue30.py b/tests/test_issue30.py
index 270f146..3452597 100644
--- a/tests/test_issue30.py
+++ b/tests/test_issue30.py
@@ -2,9 +2,8 @@ import pickle
 import sys
 
 import pytest
-import six
 
-from tblib import pickling_support  # noqa: E402
+from tblib import pickling_support
 
 pytest.importorskip('twisted')
 
@@ -21,7 +20,8 @@ def test_30():
 
     f = None
     try:
-        six.reraise(*pickle.loads(s))
+        etype, evalue, etb = pickle.loads(s)
+        raise evalue.with_traceback(etb)
     except ValueError:
         f = Failure()
 
diff --git a/tests/test_pickle_exception.py b/tests/test_pickle_exception.py
index 18a018c..aa10762 100644
--- a/tests/test_pickle_exception.py
+++ b/tests/test_pickle_exception.py
@@ -18,7 +18,7 @@ has_python3 = sys.version_info.major >= 3
 def clear_dispatch_table():
     bak = copyreg.dispatch_table.copy()
     copyreg.dispatch_table.clear()
-    yield
+    yield None
     copyreg.dispatch_table.clear()
     copyreg.dispatch_table.update(bak)
 
@@ -27,43 +27,41 @@ class CustomError(Exception):
     pass
 
 
-@pytest.mark.parametrize(
-    "protocol", [None] + list(range(1, pickle.HIGHEST_PROTOCOL + 1))
-)
-@pytest.mark.parametrize("how", ["global", "instance", "class"])
+@pytest.mark.parametrize('protocol', [None, *list(range(1, pickle.HIGHEST_PROTOCOL + 1))])
+@pytest.mark.parametrize('how', ['global', 'instance', 'class'])
 def test_install(clear_dispatch_table, how, protocol):
-    if how == "global":
+    if how == 'global':
         tblib.pickling_support.install()
-    elif how == "class":
+    elif how == 'class':
         tblib.pickling_support.install(CustomError, ZeroDivisionError)
 
     try:
         try:
-            1 / 0
+            1 / 0  # noqa: B018
         except Exception as e:
             # Python 3 only syntax
             # raise CustomError("foo") from e
-            new_e = CustomError("foo")
+            new_e = CustomError('foo')
             if has_python3:
                 new_e.__cause__ = e
             raise new_e
     except Exception as e:
         exc = e
     else:
-        assert False
+        raise AssertionError
 
     # Populate Exception.__dict__, which is used in some cases
     exc.x = 1
     if has_python3:
         exc.__cause__.x = 2
 
-    if how == "instance":
+    if how == 'instance':
         tblib.pickling_support.install(exc)
     if protocol:
         exc = pickle.loads(pickle.dumps(exc, protocol=protocol))
 
     assert isinstance(exc, CustomError)
-    assert exc.args == ("foo",)
+    assert exc.args == ('foo',)
     assert exc.x == 1
     if has_python3:
         assert exc.__traceback__ is not None
@@ -80,19 +78,19 @@ class RegisteredError(Exception):
 
 def test_install_decorator():
     with pytest.raises(RegisteredError) as ewrap:
-        raise RegisteredError("foo")
+        raise RegisteredError('foo')
     exc = ewrap.value
     exc.x = 1
     exc = pickle.loads(pickle.dumps(exc))
 
     assert isinstance(exc, RegisteredError)
-    assert exc.args == ("foo",)
+    assert exc.args == ('foo',)
     assert exc.x == 1
     if has_python3:
         assert exc.__traceback__ is not None
 
 
-@pytest.mark.skipif(sys.version_info[0] < 3, reason="No checks done in Python 2")
+@pytest.mark.skipif(sys.version_info[0] < 3, reason='No checks done in Python 2')
 def test_install_typeerror():
     with pytest.raises(TypeError):
-        tblib.pickling_support.install("foo")
+        tblib.pickling_support.install('foo')
diff --git a/tests/test_tblib.py b/tests/test_tblib.py
index bade6d4..d05160b 100644
--- a/tests/test_tblib.py
+++ b/tests/test_tblib.py
@@ -6,7 +6,7 @@ from tblib import pickling_support
 
 pickling_support.install()
 
-pytest_plugins = 'pytester',
+pytest_plugins = ('pytester',)
 
 
 def test_parse_traceback():
@@ -31,27 +31,27 @@ KeyboardInterrupt"""
     tb2 = Traceback(pytb)
 
     expected_dict = {
-        "tb_frame": {
-            "f_code": {"co_filename": "file1", "co_name": "<module>"},
-            "f_globals": {"__file__": "file1", "__name__": "?"},
-            "f_lineno": 123,
+        'tb_frame': {
+            'f_code': {'co_filename': 'file1', 'co_name': '<module>'},
+            'f_globals': {'__file__': 'file1', '__name__': '?'},
+            'f_lineno': 123,
         },
-        "tb_lineno": 123,
-        "tb_next": {
-            "tb_frame": {
-                "f_code": {"co_filename": "file2", "co_name": "???"},
-                "f_globals": {"__file__": "file2", "__name__": "?"},
-                "f_lineno": 234,
+        'tb_lineno': 123,
+        'tb_next': {
+            'tb_frame': {
+                'f_code': {'co_filename': 'file2', 'co_name': '???'},
+                'f_globals': {'__file__': 'file2', '__name__': '?'},
+                'f_lineno': 234,
             },
-            "tb_lineno": 234,
-            "tb_next": {
-                "tb_frame": {
-                    "f_code": {"co_filename": "file3", "co_name": "function3"},
-                    "f_globals": {"__file__": "file3", "__name__": "?"},
-                    "f_lineno": 345,
+            'tb_lineno': 234,
+            'tb_next': {
+                'tb_frame': {
+                    'f_code': {'co_filename': 'file3', 'co_name': 'function3'},
+                    'f_globals': {'__file__': 'file3', '__name__': '?'},
+                    'f_lineno': 345,
                 },
-                "tb_lineno": 345,
-                "tb_next": None,
+                'tb_lineno': 345,
+                'tb_next': None,
             },
         },
     }
@@ -61,9 +61,8 @@ KeyboardInterrupt"""
 
 
 def test_pytest_integration(testdir):
-    test = testdir.makepyfile("""
-import six
-
+    test = testdir.makepyfile(
+        """
 from tblib import Traceback
 
 def test_raise():
@@ -77,68 +76,76 @@ Traceback (most recent call last):
   File "file4", line 456, in ""
 ''')
     pytb = tb1.as_traceback()
-    six.reraise(RuntimeError, RuntimeError(), pytb)
-""")
+    raise RuntimeError().with_traceback(pytb)
+"""
+    )
 
     # mode(auto / long / short / line / native / no).
 
     result = testdir.runpytest_subprocess('--tb=long', '-vv', test)
-    result.stdout.fnmatch_lines([
-        "_ _ _ _ _ _ _ _ *",
-        "",
-        ">   [?][?][?]",
-        "",
-        "file1:123:*",
-        "_ _ _ _ _ _ _ _ *",
-        "",
-        ">   [?][?][?]",
-        "",
-        "file2:234:*",
-        "_ _ _ _ _ _ _ _ *",
-        "",
-        ">   [?][?][?]",
-        "",
-        "file3:345:*",
-        "_ _ _ _ _ _ _ _ *",
-        "",
-        ">   [?][?][?]",
-        "E   RuntimeError",
-        "",
-        "file4:456: RuntimeError",
-        "===*=== 1 failed in * ===*===",
-    ])
+    result.stdout.fnmatch_lines(
+        [
+            '_ _ _ _ _ _ _ _ *',
+            '',
+            '>   [?][?][?]',
+            '',
+            'file1:123:*',
+            '_ _ _ _ _ _ _ _ *',
+            '',
+            '>   [?][?][?]',
+            '',
+            'file2:234:*',
+            '_ _ _ _ _ _ _ _ *',
+            '',
+            '>   [?][?][?]',
+            '',
+            'file3:345:*',
+            '_ _ _ _ _ _ _ _ *',
+            '',
+            '>   [?][?][?]',
+            'E   RuntimeError',
+            '',
+            'file4:456: RuntimeError',
+            '===*=== 1 failed in * ===*===',
+        ]
+    )
 
     result = testdir.runpytest_subprocess('--tb=short', '-vv', test)
-    result.stdout.fnmatch_lines([
-        'test_pytest_integration.py:*: in test_raise',
-        '    six.reraise(RuntimeError, RuntimeError(), pytb)',
-        'file1:123: in <module>',
-        '    ???',
-        'file2:234: in ???',
-        '    ???',
-        'file3:345: in function3',
-        '    ???',
-        'file4:456: in ""',
-        '    ???',
-        'E   RuntimeError',
-    ])
+    result.stdout.fnmatch_lines(
+        [
+            'test_pytest_integration.py:*: in test_raise',
+            '    raise RuntimeError().with_traceback(pytb)',
+            'file1:123: in <module>',
+            '    ???',
+            'file2:234: in ???',
+            '    ???',
+            'file3:345: in function3',
+            '    ???',
+            'file4:456: in ""',
+            '    ???',
+            'E   RuntimeError',
+        ]
+    )
 
     result = testdir.runpytest_subprocess('--tb=line', '-vv', test)
-    result.stdout.fnmatch_lines([
-        "===*=== FAILURES ===*===",
-        "file4:456: RuntimeError",
-        "===*=== 1 failed in * ===*===",
-    ])
+    result.stdout.fnmatch_lines(
+        [
+            '===*=== FAILURES ===*===',
+            'file4:456: RuntimeError',
+            '===*=== 1 failed in * ===*===',
+        ]
+    )
 
     result = testdir.runpytest_subprocess('--tb=native', '-vv', test)
-    result.stdout.fnmatch_lines([
-        'Traceback (most recent call last):',
-        '  File "*test_pytest_integration.py", line *, in test_raise',
-        '    six.reraise(RuntimeError, RuntimeError(), pytb)',
-        '  File "file1", line 123, in <module>',
-        '  File "file2", line 234, in ???',
-        '  File "file3", line 345, in function3',
-        '  File "file4", line 456, in ""',
-        'RuntimeError',
-
-    ])
+    result.stdout.fnmatch_lines(
+        [
+            'Traceback (most recent call last):',
+            '  File "*test_pytest_integration.py", line *, in test_raise',
+            '    raise RuntimeError().with_traceback(pytb)',
+            '  File "file1", line 123, in <module>',
+            '  File "file2", line 234, in ???',
+            '  File "file3", line 345, in function3',
+            '  File "file4", line 456, in ""',
+            'RuntimeError',
+        ]
+    )
diff --git a/tox.ini b/tox.ini
index e052f92..8afc240 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,34 +1,34 @@
 [testenv:bootstrap]
 deps =
     jinja2
-    matrix
     tox
 skip_install = true
 commands =
     python ci/bootstrap.py --no-env
 passenv =
     *
-; a generative tox configuration, see: https://tox.readthedocs.io/en/latest/config.html#generative-envlist
 
+; a generative tox configuration, see: https://tox.wiki/en/latest/user_guide.html#generative-environments
 [tox]
 envlist =
     clean,
     check,
     docs,
-    {py27,py35,py36,py37,py38,pypy,pypy3},
+    {py37,py38,py39,py310,py311,pypy37,pypy38,pypy39},
     report
 ignore_basepython_conflict = true
 
 [testenv]
 basepython =
-    pypy: {env:TOXPYTHON:pypy}
-    pypy3: {env:TOXPYTHON:pypy3}
-    py27: {env:TOXPYTHON:python2.7}
-    py35: {env:TOXPYTHON:python3.5}
-    py36: {env:TOXPYTHON:python3.6}
+    pypy37: {env:TOXPYTHON:pypy3.7}
+    pypy38: {env:TOXPYTHON:pypy3.8}
+    pypy39: {env:TOXPYTHON:pypy3.9}
     py37: {env:TOXPYTHON:python3.7}
     py38: {env:TOXPYTHON:python3.8}
-    {bootstrap,clean,check,report,codecov,docs}: {env:TOXPYTHON:python3}
+    py39: {env:TOXPYTHON:python3.9}
+    py310: {env:TOXPYTHON:python3.10}
+    py311: {env:TOXPYTHON:python3.11}
+    {bootstrap,clean,check,report,docs,codecov}: {env:TOXPYTHON:python3}
 setenv =
     PYTHONPATH={toxinidir}/tests
     PYTHONUNBUFFERED=yes
@@ -37,28 +37,23 @@ passenv =
 usedevelop = false
 deps =
     pytest
-    pytest-travis-fold
     pytest-cov
-    pytest-clarity
-    six
-    py{27,35,36,37,38,py,py3}: twisted
 commands =
-    {posargs:py.test --cov=tblib --cov-report=term-missing -vv tests README.rst}
+    {posargs:pytest --cov --cov-report=term-missing --cov-report=xml -vv tests}
 
 [testenv:check]
 deps =
     docutils
     check-manifest
-    flake8
+    pre-commit
     readme-renderer
     pygments
     isort
 skip_install = true
 commands =
     python setup.py check --strict --metadata --restructuredtext
-    check-manifest {toxinidir}
-    flake8 src tests setup.py
-    isort --verbose --check-only --diff --recursive src tests setup.py
+    check-manifest .
+    pre-commit run --all-files --show-diff-on-failure
 
 [testenv:docs]
 usedevelop = true
@@ -68,15 +63,9 @@ commands =
     sphinx-build {posargs:-E} -b html docs dist/docs
     sphinx-build -b linkcheck docs dist/docs
 
-[testenv:codecov]
-deps =
-    codecov
-skip_install = true
-commands =
-    codecov []
-
 [testenv:report]
-deps = coverage
+deps =
+    coverage
 skip_install = true
 commands =
     coverage report
@@ -85,4 +74,5 @@ commands =
 [testenv:clean]
 commands = coverage erase
 skip_install = true
-deps = coverage
+deps =
+    coverage