On 7/27/06, Greg Ewing <[EMAIL PROTECTED]> wrote: > Guido van Rossum wrote: > > So how about we change callable() and add hashable(), iterable() and > > whatever else makes sense so that these all become like this: > > > > def callable(x): > > return getattr(x, "__call__", None) is not None > > This *still* doesn't fully solve the problem in the case > of __hash__, since a container may be unhashable due to > its contents, even if it has a __hash__ method itself. > > It might be good enough for whatever these hypothetical > hashability-testing use cases require though. We'd have > to catch one of those elusive beasts to find out...
I already proposed to deal with that the same way we handle signature mismatches with __call__ -- you'll find out when you actually try to do it. That should be good enough. -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
