Message 117219 - Python tracker

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Author	georg.brandl
Recipients	Mark.Shannon, georg.brandl, r.david.murray
Date	2010-09-23.19:12:03
SpamBayes Score	0.00022677511
Marked as misclassified	No
Message-id	<1285269126.06.0.442755481312.issue9930@psf.upfronthosting.co.za>
In-reply-to

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This is indeed weird. PyNumber_Add ends up calling compare_add with the float as its first argument, which is impossible to do from Python. And the wrap_binaryfunc_r check for subtypes means that compare.__radd__ claims it doesn't support floats either. So from Python, it's impossible to add floats and complex numbers via __special__ methods :) Maybe Mark wants to shed some light?

This is indeed weird.  PyNumber_Add ends up calling compare_add with the float as its first argument, which is impossible to do from Python.  And the wrap_binaryfunc_r check for subtypes means that compare.__radd__ claims it doesn't support floats either.  So from Python, it's impossible to add floats and complex numbers via __special__ methods :)

Maybe Mark wants to shed some light?

History
Date	User	Action	Args
2010-09-23 19:12:06	georg.brandl	set	recipients: + georg.brandl, r.david.murray, Mark.Shannon
2010-09-23 19:12:06	georg.brandl	set	messageid: <1285269126.06.0.442755481312.issue9930@psf.upfronthosting.co.za>
2010-09-23 19:12:04	georg.brandl	link	issue9930 messages
2010-09-23 19:12:03	georg.brandl	create