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, 12 insertions, 8 deletions

diff --git a/lib/sqlalchemy/orm/events.py b/lib/sqlalchemy/orm/events.py
index c2a2d15ee..7c4cfc3ba 100644
--- a/lib/sqlalchemy/orm/events.py
+++ b/lib/sqlalchemy/orm/events.py
@@ -8,17 +8,21 @@
 """ORM event interfaces.
 
 """
-from .. import event, exc, util
-from .base import _mapper_or_none
-import inspect
 import weakref
+
+from . import instrumentation
 from . import interfaces
-from . import mapperlib, instrumentation
-from .session import Session, sessionmaker
-from .scoping import scoped_session
+from . import mapperlib
 from .attributes import QueryableAttribute
+from .base import _mapper_or_none
 from .query import Query
-from sqlalchemy.util.compat import inspect_getargspec
+from .scoping import scoped_session
+from .session import Session
+from .session import sessionmaker
+from .. import event
+from .. import exc
+from .. import util
+from ..util.compat import inspect_getargspec
 
 
 class InstrumentationEvents(event.Events):
@@ -1885,7 +1889,7 @@ class SessionEvents(event.Events):
 
 
 class AttributeEvents(event.Events):
-    """Define events for object attributes.
+    r"""Define events for object attributes.
 
     These are typically defined on the class-bound descriptor for the
     target class.