def get_file_extension(filename):
    return os.path.splitext(filename)[1][1:].lower()
Returns a dict of authorized tokens after they go through the :class:`get_authentication_tokens` phase.
dataset/ETHPy150Open mardix/flask-cloudy/flask_cloudy.py/get_file_extension--crossover with--dataset/ETHPy150Open splunk/splunk-app-twitter/twitter2/bin/twython/api.py/Twython.get_authorized_tokens