Message 195490 - Python tracker

Message195490

Author	arigo
Recipients	arigo, mark.dickinson, serhiy.storchaka, zach.ware
Date	2013-08-17.16:12:22
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1376755943.08.0.713689462343.issue18712@psf.upfronthosting.co.za>
In-reply-to

Content
Sorry, realized that my pure Python algorithm isn't equivalent to _PyType_Lookup() --- it fails the staticmethod example of Serhiy. A closer one would be: for t in type(a).__mro__: if '__index__' in t.__dict__: return t.__dict__['__index__'].__get__(a)() But it's still not a perfect match. I think right now the only "perfect" answer is given by workarounds like "range(a).stop"...

Content

Sorry, realized that my pure Python algorithm isn't equivalent to _PyType_Lookup() --- it fails the staticmethod example of Serhiy.  A closer one would be:

    for t in type(a).__mro__:
        if '__index__' in t.__dict__:
            return t.__dict__['__index__'].__get__(a)()

But it's still not a perfect match.  I think right now the only "perfect" answer is given by workarounds like "range(a).stop"...

History
Date	User	Action	Args
2013-08-17 16:12:23	arigo	set	recipients: + arigo, mark.dickinson, zach.ware, serhiy.storchaka
2013-08-17 16:12:23	arigo	set	messageid: <1376755943.08.0.713689462343.issue18712@psf.upfronthosting.co.za>
2013-08-17 16:12:23	arigo	link	issue18712 messages
2013-08-17 16:12:22	arigo	create