>>> q = URL('string_url_taken_by_reverse')
>>> q.query_param('autocomplete', 'qwer')
_URLTuple(host=u'', username=None, password=None, scheme='', port=None, path=u'string_url_taken_by_reverse', query='autocomplete=qwer', fragment='')
>>> q.query_param('media_type', 1)
_URLTuple(host=u'', username=None, password=None, scheme='', port=None, path=u'string_url_taken_by_reverse', query='media_type=1', fragment='')
>>> q.as_string()
u'string_url_taken_by_reverse'