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

2 files changed, 20 insertions, 4 deletions

diff --git a/examples/join_conditions/cast.py b/examples/join_conditions/cast.py
index 7ea775689..e175bc227 100644
--- a/examples/join_conditions/cast.py
+++ b/examples/join_conditions/cast.py
@@ -29,9 +29,16 @@ in order to note to the ORM that ``B.a_id`` should be treated like the
 "foreign key" column.
 
 """
-from sqlalchemy import *
-from sqlalchemy.orm import *
+
+from sqlalchemy import Column
+from sqlalchemy import create_engine
+from sqlalchemy import Integer
+from sqlalchemy import String
+from sqlalchemy import TypeDecorator
 from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship
+from sqlalchemy.orm import Session
+
 
 Base = declarative_base()
 
diff --git a/examples/join_conditions/threeway.py b/examples/join_conditions/threeway.py
index 257002637..aca3b0c2f 100644
--- a/examples/join_conditions/threeway.py
+++ b/examples/join_conditions/threeway.py
@@ -33,9 +33,18 @@ a Query (or a :func:`.relationship`).
 
 
 """
-from sqlalchemy import *
-from sqlalchemy.orm import *
+from sqlalchemy import and_
+from sqlalchemy import Column
+from sqlalchemy import create_engine
+from sqlalchemy import Integer
+from sqlalchemy import join
+from sqlalchemy import String
 from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import foreign
+from sqlalchemy.orm import mapper
+from sqlalchemy.orm import relationship
+from sqlalchemy.orm import Session
+
 
 Base = declarative_base()