twilio/flask-restful — pull request #41 by frankstratton (2013-01-21 05:17:01+00:00)
Title: action='append' should always return a list

Currently when you use action='append' in the request parser, it will return a list unless it's a single value. This causes you to write type checking code for mixed return types. python argparse doesn't do this, so I've updated flask-restful to match this behavior.