Lots of fixes to the code examples to specify imports explicitly.

Explicit imports make it easier for users to understand the examples.
Additionally a lot of the examples were fixed to work with the changes in the
0.5.x code base. One small correction to the Case expression.  Thanks a bunch
to Adam Lowry! Fixes #717.

1 files changed, 7 insertions, 7 deletions

diff --git a/examples/postgis/postgis.py b/examples/postgis/postgis.py
index 802aa0ea9..c482d8256 100644
--- a/examples/postgis/postgis.py
+++ b/examples/postgis/postgis.py
@@ -28,11 +28,10 @@ Includes:
  * a standalone operator example.
 
 The implementation is limited to only public, well known
-and simple to use extension points, with the exception
-of one temporary monkeypatch in the DDL extension.  
-Future SQLAlchemy expansion points may allow more seamless
-integration of some features.
- 
+and simple to use extension points. Future SQLAlchemy
+expansion points may allow more seamless integration of
+some features.
+
 """
 
 from sqlalchemy.orm.interfaces import AttributeExtension
@@ -227,8 +226,9 @@ def GISColumn(*args, **kw):
 
 # illustrate usage
 if __name__ == '__main__':
-    from sqlalchemy import *
-    from sqlalchemy.orm import *
+    from sqlalchemy import (create_engine, MetaData, Column, Integer, String,
+        func, literal, select)
+    from sqlalchemy.orm import sessionmaker, column_property
     from sqlalchemy.ext.declarative import declarative_base
 
     engine = create_engine('postgres://scott:tiger@localhost/gistest', echo=True)