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, 11 insertions, 9 deletions

diff --git a/examples/versioned_rows/versioned_rows.py b/examples/versioned_rows/versioned_rows.py
index 03e1c3510..01067431c 100644
--- a/examples/versioned_rows/versioned_rows.py
+++ b/examples/versioned_rows/versioned_rows.py
@@ -3,17 +3,19 @@ an UPDATE statement on a single row into an INSERT statement, so that a new
 row is inserted with the new data, keeping the old row intact.
 
 """
-from sqlalchemy.orm import (
-    sessionmaker,
-    relationship,
-    make_transient,
-    backref,
-    Session,
-)
-from sqlalchemy import Column, ForeignKey, create_engine, Integer, String
+from sqlalchemy import Column
+from sqlalchemy import create_engine
+from sqlalchemy import event
+from sqlalchemy import ForeignKey
+from sqlalchemy import Integer
+from sqlalchemy import String
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import attributes
-from sqlalchemy import event
+from sqlalchemy.orm import backref
+from sqlalchemy.orm import make_transient
+from sqlalchemy.orm import relationship
+from sqlalchemy.orm import Session
+from sqlalchemy.orm import sessionmaker
 
 
 class Versioned(object):