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-rw-r--r--compose/cli/command.py6
-rw-r--r--compose/project.py3
-rw-r--r--compose/service.py4
3 files changed, 8 insertions, 5 deletions
diff --git a/compose/cli/command.py b/compose/cli/command.py
index cf77237a..2fabbe18 100644
--- a/compose/cli/command.py
+++ b/compose/cli/command.py
@@ -40,7 +40,8 @@ SILENT_COMMANDS = {
}
-def project_from_options(project_dir, options, additional_options={}):
+def project_from_options(project_dir, options, additional_options=None):
+ additional_options = additional_options or {}
override_dir = options.get('--project-directory')
environment_file = options.get('--env-file')
environment = Environment.from_env_file(override_dir or project_dir, environment_file)
@@ -81,7 +82,8 @@ def set_parallel_limit(environment):
parallel.GlobalLimit.set_global_limit(parallel_limit)
-def get_config_from_options(base_dir, options, additional_options={}):
+def get_config_from_options(base_dir, options, additional_options=None):
+ additional_options = additional_options or {}
override_dir = options.get('--project-directory')
environment_file = options.get('--env-file')
environment = Environment.from_env_file(override_dir or base_dir, environment_file)
diff --git a/compose/project.py b/compose/project.py
index a7770ddc..696c8b04 100644
--- a/compose/project.py
+++ b/compose/project.py
@@ -87,10 +87,11 @@ class Project(object):
return labels
@classmethod
- def from_config(cls, name, config_data, client, default_platform=None, extra_labels=[]):
+ def from_config(cls, name, config_data, client, default_platform=None, extra_labels=None):
"""
Construct a Project from a config.Config object.
"""
+ extra_labels = extra_labels or []
use_networking = (config_data.version and config_data.version != V1)
networks = build_networks(name, config_data, client)
project_networks = ProjectNetworks.from_services(
diff --git a/compose/service.py b/compose/service.py
index 024e7fbd..ebe237b8 100644
--- a/compose/service.py
+++ b/compose/service.py
@@ -185,7 +185,7 @@ class Service(object):
scale=1,
pid_mode=None,
default_platform=None,
- extra_labels=[],
+ extra_labels=None,
**options
):
self.name = name
@@ -201,7 +201,7 @@ class Service(object):
self.scale_num = scale
self.default_platform = default_platform
self.options = options
- self.extra_labels = extra_labels
+ self.extra_labels = extra_labels or []
def __repr__(self):
return '<Service: {}>'.format(self.name)