Post black reformatting

Applied on top of a pure run of black -l 79 in
I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9,  this set of changes
resolves all remaining flake8 conditions for those codes
we have enabled in setup.cfg.

Included are resolutions for all remaining flake8 issues
including shadowed builtins, long lines, import order, unused
imports, duplicate imports, and docstring issues.

Change-Id: I4f72d3ba1380dd601610ff80b8fb06a2aff8b0fe

1 files changed, 23 insertions, 10 deletions

diff --git a/test/ext/test_mutable.py b/test/ext/test_mutable.py
index d46ace9a8..9b8f761e9 100644
--- a/test/ext/test_mutable.py
+++ b/test/ext/test_mutable.py
@@ -1,17 +1,30 @@
-from sqlalchemy import Integer, ForeignKey, String, func
-from sqlalchemy.types import PickleType, TypeDecorator, VARCHAR
-from sqlalchemy.orm import mapper, Session, composite, column_property
-from sqlalchemy.orm.mapper import Mapper
+from sqlalchemy import event
+from sqlalchemy import ForeignKey
+from sqlalchemy import func
+from sqlalchemy import Integer
+from sqlalchemy import String
+from sqlalchemy.ext.mutable import MutableComposite
+from sqlalchemy.ext.mutable import MutableDict
+from sqlalchemy.ext.mutable import MutableList
+from sqlalchemy.ext.mutable import MutableSet
 from sqlalchemy.orm import attributes
+from sqlalchemy.orm import column_property
+from sqlalchemy.orm import composite
+from sqlalchemy.orm import mapper
+from sqlalchemy.orm import Session
 from sqlalchemy.orm.instrumentation import ClassManager
-from sqlalchemy.testing.schema import Table, Column
-from sqlalchemy.testing import eq_, assert_raises_message, assert_raises
-from sqlalchemy.testing.util import picklers
+from sqlalchemy.orm.mapper import Mapper
+from sqlalchemy.testing import assert_raises
+from sqlalchemy.testing import assert_raises_message
+from sqlalchemy.testing import eq_
 from sqlalchemy.testing import fixtures
-from sqlalchemy.ext.mutable import MutableComposite
-from sqlalchemy.ext.mutable import MutableDict, MutableList, MutableSet
 from sqlalchemy.testing import mock
-from sqlalchemy import event
+from sqlalchemy.testing.schema import Column
+from sqlalchemy.testing.schema import Table
+from sqlalchemy.testing.util import picklers
+from sqlalchemy.types import PickleType
+from sqlalchemy.types import TypeDecorator
+from sqlalchemy.types import VARCHAR
 
 
 class Foo(fixtures.BasicEntity):