Merge branch 'day-16' of github.com:michaelliao/awesome-python-webapp into day-16

Author: michaelliao

www/transwarp/db.py

@@ -122,6 +122,7 @@ def init(self):
 
     def cleanup(self):
         self.connection.cleanup()
+        self.connection = None
 
     def cursor(self):
         '''