Message 122453 - Python tracker

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In-reply-to
Author	mark.dickinson
Recipients	gumtree, mark.dickinson, meador.inge
Date	2010年11月26日.13:12:33
SpamBayes Score	0.00016970516
Marked as misclassified	No
Message-id	<1290777155.61.0.573607722281.issue5211@psf.upfronthosting.co.za>

Content
I think that's expected behaviour. Note that int vs float behaves in the same way as float vs complex: >>> class xint(int): ... def __radd__(self, other): ... print "__radd__" ... return 42 ... >>> 3 + xint(5) __radd__ 42 >>> 3.0 + xint(5) # xint.__radd__ not called. 8.0 As with your example, the float.__add__ method is happy to deal with an int or an instance of any subclass of int.

Content

I think that's expected behaviour. Note that int vs float behaves in the same way as float vs complex:
>>> class xint(int):
... def __radd__(self, other):
... print "__radd__"
... return 42
... 
>>> 3 + xint(5)
__radd__
42
>>> 3.0 + xint(5) # xint.__radd__ not called.
8.0
As with your example, the float.__add__ method is happy to deal with an int or an instance of any subclass of int.

History
Date	User	Action	Args
2010年11月26日 13:12:35	mark.dickinson	set	recipients: + mark.dickinson, gumtree, meador.inge
2010年11月26日 13:12:35	mark.dickinson	set	messageid: <1290777155.61.0.573607722281.issue5211@psf.upfronthosting.co.za>
2010年11月26日 13:12:33	mark.dickinson	link	issue5211 messages
2010年11月26日 13:12:33	mark.dickinson	create

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