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, 10 insertions, 6 deletions

diff --git a/lib/sqlalchemy/ext/mutable.py b/lib/sqlalchemy/ext/mutable.py
index 0f6ccdc33..96372639f 100644
--- a/lib/sqlalchemy/ext/mutable.py
+++ b/lib/sqlalchemy/ext/mutable.py
@@ -370,12 +370,16 @@ pickling process of the parent's object-relational state so that the
 :meth:`MutableBase._parents` collection is restored to all ``Point`` objects.
 
 """
+import weakref
+
+from .. import event
+from .. import types
+from ..orm import Mapper
+from ..orm import mapper
+from ..orm import object_mapper
 from ..orm.attributes import flag_modified
-from .. import event, types
-from ..orm import mapper, object_mapper, Mapper
-from ..util import memoized_property
 from ..sql.base import SchemaEventTarget
-import weakref
+from ..util import memoized_property
 
 
 class MutableBase(object):
@@ -479,7 +483,7 @@ class MutableBase(object):
             if not attrs or listen_keys.intersection(attrs):
                 load(state)
 
-        def set(target, value, oldvalue, initiator):
+        def set_(target, value, oldvalue, initiator):
             """Listen for set/replace events on the target
             data member.
 
@@ -519,7 +523,7 @@ class MutableBase(object):
             parent_cls, "refresh_flush", load_attrs, raw=True, propagate=True
         )
         event.listen(
-            attribute, "set", set, raw=True, retval=True, propagate=True
+            attribute, "set", set_, raw=True, retval=True, propagate=True
         )
         event.listen(parent_cls, "pickle", pickle, raw=True, propagate=True)
         event.listen(