On 17 January 2014 15:50, Eric V. Smith <e...@trueblade.com> wrote: > For #3, hopefully this "additional work" on the 3.x side would just be > to add, to each class where you already have a custom __format__ used > for b''.format(), code like: > > def __format_ascii__(self, fmt): > return self.__format__(fmt.decode()).encode('ascii')
For me, the big cost would seem to be in the necessary documentation, explaining the new special method in the language reference, explaining the 2 different forms of format() in the built in types docs. And the conceptual overhead of another special method for people to be aware of. If I implement my own number subclass, do I need to implement __format_ascii__? My gut feeling is that we simply don't implement format() for bytes. I don't see sufficient benefit, if %-formatting is available. Paul. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com