Update test dependencies to latest version, fix some flake8 errors

Signed-off-by: Joffrey F <joffrey@docker.com>

docker/auth.py

@@ -273,7 +273,7 @@ class AuthConfig(dict):
                     'Password': data['Secret'],
                 })
             return res
-        except dockerpycreds.CredentialsNotFound as e:
+        except dockerpycreds.CredentialsNotFound:
             log.debug('No entry found')
             return None
         except dockerpycreds.StoreError as e:

docker/types/containers.py

@@ -51,8 +51,7 @@ class LogConfig(DictType):
         ...    host_config=hc)
         >>> client.inspect_container(container)['HostConfig']['LogConfig']
         {'Type': 'json-file', 'Config': {'labels': 'production_status,geo', 'max-size': '1g'}}
-
-    """ # flake8: noqa
+    """  # noqa: E501
     types = LogConfigTypesEnum
 
     def __init__(self, **kwargs):
@@ -320,10 +319,10 @@ class HostConfig(dict):
             if not isinstance(ulimits, list):
                 raise host_config_type_error('ulimits', ulimits, 'list')
             self['Ulimits'] = []
-            for l in ulimits:
-                if not isinstance(l, Ulimit):
-                    l = Ulimit(**l)
-                self['Ulimits'].append(l)
+            for lmt in ulimits:
+                if not isinstance(lmt, Ulimit):
+                    lmt = Ulimit(**lmt)
+                self['Ulimits'].append(lmt)
 
         if log_config is not None:
             if not isinstance(log_config, LogConfig):

setup.py

@@ -67,7 +67,7 @@ setup(
     url='https://github.com/docker/docker-py',
     project_urls={
         'Documentation': 'https://docker-py.readthedocs.io',
-        'Changelog': 'https://docker-py.readthedocs.io/en/stable/change-log.html',  # flake8: noqa
+        'Changelog': 'https://docker-py.readthedocs.io/en/stable/change-log.html',  # noqa: E501
         'Source': 'https://github.com/docker/docker-py',
         'Tracker': 'https://github.com/docker/docker-py/issues',
     },

test-requirements.txt

-coverage==3.7.1
-flake8==3.4.1
+coverage==4.5.2
+flake8==3.6.0; python_version != '3.3'
+flake8==3.4.1; python_version == '3.3'
 mock==1.0.1
 pytest==2.9.1; python_version == '3.3'
-pytest==3.6.3; python_version > '3.3'
-pytest-cov==2.1.0
+pytest==4.1.0; python_version != '3.3'
+pytest-cov==2.6.1; python_version != '3.3'
+pytest-cov==2.5.1; python_version == '3.3'
 pytest-timeout==1.3.3

tests/integration/api_client_test.py

@@ -47,7 +47,7 @@ class ConnectionTimeoutTest(unittest.TestCase):
         # This call isn't supposed to complete, and it should fail fast.
         try:
             res = self.client.inspect_container('id')
-        except:
+        except:  # noqa: E722
             pass
         end = time.time()
         assert res is None

tests/unit/dockertypes_test.py

@@ -14,7 +14,7 @@ from docker.types.services import convert_service_ports
 
 try:
     from unittest import mock
-except:
+except:  # noqa: E722
     import mock