Patches item #1708353, was opened at 2007-04-26 16:16 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=305470&aid=1708353&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Core (C code) Group: Python 3000 Status: Open Resolution: None Priority: 5 Private: No Submitted By: Guido van Rossum (gvanrossum) Assigned to: Guido van Rossum (gvanrossum) Summary: Make isinstance/issubclass overloadable Initial Comment: I came up with a fairly simple way to overload isinstance() and issubclass(). The class that is the second argument can define a (class) method named __instancecheck__ or __subclasscheck__ which, if present, will be called *instead* of the normal approach. The names are different to remind users that the calling convention is the opposite -- isinstance(x, C) maps to C.__instancecheck__(x). ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=305470&aid=1708353&group_id=5470 _______________________________________________ Patches mailing list [email protected] http://mail.python.org/mailman/listinfo/patches
