Removed Python2 support

Closes: #6890

Some remarks,

- `# coding ... utf-8` statements are not needed
- isdigit on strings instead of a try-catch.
- Default opening mode is read, so we can do `open()` without the `'r'` everywhere
- Removed inheritinng from `object` class, it isn't necessary in python3.
- `super(ClassName, self)` can now be replaced with `super()`
- Use of itertools and `chain` on a couple places dealing with sets.
- Used the operator module instead of lambdas when warranted
    `itemgetter(0)` instead of `lambda x: x[0]`
    `attrgetter('name')` instead of `lambda x: x.name`
- `sorted` returns a list, so no need to use `list(sorted(...))`
- Removed `dict()` using dictionary comprehensions whenever possible
- Attempted to remove python3.2 support

Signed-off-by: alexrecuenco <alejandrogonzalezrecuenco@gmail.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/compose/container.py b/compose/container.py
index 7160a982..00626b61 100644
--- a/compose/container.py
+++ b/compose/container.py
@@ -12,7 +12,7 @@ from .utils import truncate_id
 from .version import ComposeVersion
 
 
-class Container(object):
+class Container:
     """
     Represents a Docker container, constructed from the output of
     GET /containers/:id:/json.
@@ -78,8 +78,8 @@ class Container(object):
 
     @property
     def name_without_project(self):
-        if self.name.startswith('{0}_{1}'.format(self.project, self.service)):
-            return '{0}_{1}'.format(self.service, self.number if self.number is not None else self.slug)
+        if self.name.startswith('{}_{}'.format(self.project, self.service)):
+            return '{}_{}'.format(self.service, self.number if self.number is not None else self.slug)
         else:
             return self.name
 
@@ -91,7 +91,7 @@ class Container(object):
 
         number = self.labels.get(LABEL_CONTAINER_NUMBER)
         if not number:
-            raise ValueError("Container {0} does not have a {1} label".format(
+            raise ValueError("Container {} does not have a {} label".format(
                 self.short_id, LABEL_CONTAINER_NUMBER))
         return int(number)
 
@@ -224,7 +224,7 @@ class Container(object):
         return reduce(get_value, key.split('.'), self.dictionary)
 
     def get_local_port(self, port, protocol='tcp'):
-        port = self.ports.get("%s/%s" % (port, protocol))
+        port = self.ports.get("{}/{}".format(port, protocol))
         return "{HostIp}:{HostPort}".format(**port[0]) if port else None
 
     def get_mount(self, mount_dest):
@@ -266,7 +266,7 @@ class Container(object):
         """
         if not self.name.startswith(self.short_id):
             self.client.rename(
-                self.id, '{0}_{1}'.format(self.short_id, self.name)
+                self.id, '{}_{}'.format(self.short_id, self.name)
             )
 
     def inspect_if_not_inspected(self):
@@ -309,7 +309,7 @@ class Container(object):
         )
 
     def __repr__(self):
-        return '<Container: %s (%s)>' % (self.name, self.id[:6])
+        return '<Container: {} ({})>'.format(self.name, self.id[:6])
 
     def __eq__(self, other):
         if type(self) != type(other):