Re: Retrieving an object from a set

From	Vito De Tullio <vito.detullio@gmail.com>
Subject	Re: Retrieving an object from a set
Date	2013-01-26 08:55 +0100
References	<CAJ6cK1b=F5JXL=FN0qouS-idbE8xnVURm0ZZrZ8-DW2xbLNErg@mail.gmail.com> <51031922.2020104@mrabarnett.plus.com> <CALwzid=YsWTow=0E=_spexS1JFagPtPgBUi-ksDCfByLE8Kc7A@mail.gmail.com> <510345FA.5000607@mrabarnett.plus.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.1069.1359186965.2939.python-list@python.org> (permalink)

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MRAB wrote:

> It turns out that both S & {x} and {x} & S return {x}, not {y}.

curious.

$ python
Python 2.7.3 (default, Jul  3 2012, 19:58:39) 
[GCC 4.7.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> x = (1,2,3)
>>> y = (1,2,3)
>>> s = set([y])
>>> (s & set([x])).pop() is y
False
>>> (set([x]) & s).pop() is y
True

maybe it's implementation-defined?

-- 
ZeD

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Re: Retrieving an object from a set Vito De Tullio <vito.detullio@gmail.com> - 2013-01-26 08:55 +0100

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