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, 9 insertions, 2 deletions

diff --git a/examples/adjacency_list/adjacency_list.py b/examples/adjacency_list/adjacency_list.py
index f1628a632..8cdd88540 100644
--- a/examples/adjacency_list/adjacency_list.py
+++ b/examples/adjacency_list/adjacency_list.py
@@ -1,6 +1,13 @@
-from sqlalchemy import Column, ForeignKey, Integer, String, create_engine
-from sqlalchemy.orm import Session, relationship, backref, joinedload_all
+from sqlalchemy import Column
+from sqlalchemy import create_engine
+from sqlalchemy import ForeignKey
+from sqlalchemy import Integer
+from sqlalchemy import String
 from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import backref
+from sqlalchemy.orm import joinedload_all
+from sqlalchemy.orm import relationship
+from sqlalchemy.orm import Session
 from sqlalchemy.orm.collections import attribute_mapped_collection