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, 3 deletions

diff --git a/examples/materialized_paths/materialized_paths.py b/examples/materialized_paths/materialized_paths.py
index 45ae0c193..f777f131b 100644
--- a/examples/materialized_paths/materialized_paths.py
+++ b/examples/materialized_paths/materialized_paths.py
@@ -26,11 +26,20 @@ already stored in the path itself. Updates require going through all
 descendants and changing the prefix.
 
 """
-from sqlalchemy import Column, Integer, String, func, select, create_engine
-from sqlalchemy.orm import remote, foreign, relationship, Session
+from sqlalchemy import Column
+from sqlalchemy import create_engine
+from sqlalchemy import func
+from sqlalchemy import Integer
+from sqlalchemy import select
+from sqlalchemy import String
+from sqlalchemy.dialects.postgresql import ARRAY
 from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import foreign
+from sqlalchemy.orm import relationship
+from sqlalchemy.orm import remote
+from sqlalchemy.orm import Session
 from sqlalchemy.sql.expression import cast
-from sqlalchemy.dialects.postgresql import ARRAY
+
 
 Base = declarative_base()