def __init__(self, url, length, mime_type):
        self.length, self.mime_type = length, mime_type
        self.url = iri_to_uri(url)
All args are expected to be Python Unicode objects
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/utils/feedgenerator.py/Enclosure.__init__