On Tue, Sep 4, 2012 at 5:18 PM, Michael Bayer <mike...@zzzcomputing.com> wrote: > can't do __contains__ due to Python behavior: > > class Foo(object): > def __add__(self, other): > return (self, "add", other) > > def __contains__(self, other): > return (self, "contains", other) > > f1 = Foo() > > assert f1 + 5 == (f1, "add", 5) > > assert 5 in f1 == (f1, "contains", 5), 5 in f1 > > second assertion fails, it forces a bool() on the result. __nonzero__() is > required to return True/False/int, I suppose we could make a custom int > subclass but that's getting really weird.
Oh right. Thanks for the explanation. -- Eric Lemoine Camptocamp France SAS Savoie Technolac, BP 352 73377 Le Bourget du Lac, Cedex Tel : 00 33 4 79 44 44 96 Mail : eric.lemo...@camptocamp.com http://www.camptocamp.com -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
