114     def __contains__(self, offer):  argument
120             if self._match(mask, offer):
123     def quality(self, offer, modifier=1):  argument
130             if self._match(mask, offer):
162         for offer in offers:
163             if isinstance(offer, (tuple, list)):
164                 offer, server_quality = offer
176                 if self._match(mask, offer):
178                     best_offer = offer
182     def _match(self, mask, offer):  argument
183         _check_offer(offer)
184         return mask == '*' or offer.lower() == mask.lower()
220     def quality(self, offer, default_quality=1):  argument
229         for offer in offers:
230             _check_offer(offer)
231             if isinstance(offer, (list, tuple)):
232                 offer, quality = offer
236                 best_offer = offer
299     def _match(self, mask, offer):  argument
303         _check_offer(offer)
305             return offer.lower() == mask.lower()
311             offer_major = offer.split('/', 1)[0].lower()
318 def _check_offer(offer):  argument
319     if '*' in offer:
320         raise ValueError("The application should offer specific types, got %r" % offer)