mailgun/documentation — pull request #42 by justinvw (2014-02-24 15:30:15+00:00)
Title: Removed duplicate key entries in dictionaries of Python examples

In two of the Python examples the same dictionary keys were used multiple times. This resulted in API requests were only the last defined value would be sent to the server. I replaced the duplicate key/value pairs with lists, which Requests handles as intended.