Hey Jason, thanks for your pull request!
So, I've tested your code and sometimes it's crashing because dicts don't keep orders when insertions may occur (so data.keys()[1] won't be always what you want):

Testing sendAudio - File

/home/leandrotoledo/workspace/python-telegram/telegram/bot.py(608)_requestUrl()
-> if len(data) >= 2 and data.keys()[1] in file_type and
(Pdb) len(data)
2
(Pdb) data.keys()[1] in file_type
False
(Pdb) data.keys()
'audio', 'chat_id' data.keys()[1]
'chat_id'

You can try something like:

def _isfilerequest(self,
                   data=None):
    if data:
        file_types = ['audio', 'document', 'photo', 'video']
        file_type = [i for i in data.keys() if i in file_types]

        if file_type:
            file_content = data[file_type[0]]
            ...

    return False

Great idea about decorators!

Your method seems to be much better, i will try. I didn't imagine problem like that. T^T Thanks for your test and review!

All tests passed right away! Yay. I'm merging your pull request.

Thank you very much! :)