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, 20 insertions, 13 deletions

diff --git a/lib/sqlalchemy/testing/assertions.py b/lib/sqlalchemy/testing/assertions.py
index 73ab4556a..11b77d72a 100644
--- a/lib/sqlalchemy/testing/assertions.py
+++ b/lib/sqlalchemy/testing/assertions.py
@@ -7,19 +7,26 @@
 
 from __future__ import absolute_import
 
-from . import util as testutil
-from sqlalchemy import pool, orm, util
-from sqlalchemy.engine import default, url
-from sqlalchemy.util import decorator, compat
-from sqlalchemy import types as sqltypes, schema, exc as sa_exc
-import warnings
+import contextlib
 import re
-from .exclusions import db_spec
+import warnings
+
 from . import assertsql
 from . import config
-from .util import fail
-import contextlib
 from . import mock
+from . import util as testutil
+from .exclusions import db_spec
+from .util import fail
+from .. import exc as sa_exc
+from .. import orm
+from .. import pool
+from .. import schema
+from .. import types as sqltypes
+from .. import util
+from ..engine import default
+from ..engine import url
+from ..util import compat
+from ..util import decorator
 
 
 def expect_warnings(*messages, **kw):
@@ -442,15 +449,15 @@ class AssertsExecutionResults(object):
         print(repr(result))
         self.assert_list(result, class_, objects)
 
-    def assert_list(self, result, class_, list):
+    def assert_list(self, result, class_, list_):
         self.assert_(
-            len(result) == len(list),
+            len(result) == len(list_),
             "result list is not the same size as test list, "
             + "for class "
             + class_.__name__,
         )
-        for i in range(0, len(list)):
-            self.assert_row(class_, result[i], list[i])
+        for i in range(0, len(list_)):
+            self.assert_row(class_, result[i], list_[i])
 
     def assert_row(self, class_, rowobj, desc):
         self.assert_(