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Re: operator module functions

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From Chris Kaynor <ckaynor@zindagigames.com>
Date 2014-10-08 15:40 -0700
Subject Re: operator module functions
Newsgroups comp.lang.python
Message-ID <mailman.14696.1412808045.18130.python-list@python.org> (permalink)

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On Wed, Oct 8, 2014 at 3:30 PM, Chris Angelico <rosuav@gmail.com> wrote:

> >
> >
> > That doesn't always seem to have been the case, however.
> > In Python 2.7 and 3.3, I get
> >
> >>>> operator.add is operator.__add__
> > False
>
> Huh. So it is.
>
> rosuav@sikorsky:~$ python3
> Python 3.5.0a0 (default:301b9a58021c, Oct  2 2014, 09:20:24)
> [GCC 4.7.2] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import operator
> >>> operator.add, operator.__add__
> (<built-in function add>, <built-in function add>)
> >>>
> rosuav@sikorsky:~$ python
> Python 2.7.3 (default, Mar 13 2014, 11:03:55)
> [GCC 4.7.2] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import operator
> >>> operator.add, operator.__add__
> (<built-in function add>, <built-in function __add__>)
> >>>
>
> Presumably they have the same code behind them, just different
> function names. But anyway, the fact that it doesn't throw back an
> AttributeError proves that both functions do at least exist.
>
> Learn something new every day!


I only tried it in Python 3.4, and I got true. Perhaps it was optimized
slightly after 3.3?

Chris

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Thread

operator module functions Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-10-08 12:41 +1100
  Re: operator module functions Terry Reedy <tjreedy@udel.edu> - 2014-10-08 02:28 -0400
  Re: operator module functions marco.nawijn@colosso.nl - 2014-10-08 01:46 -0700
    Re: operator module functions Chris Angelico <rosuav@gmail.com> - 2014-10-08 20:32 +1100
      Re: operator module functions Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-10-09 10:37 +1300
        Re: operator module functions Chris Angelico <rosuav@gmail.com> - 2014-10-09 09:30 +1100
        Re: operator module functions Chris Kaynor <ckaynor@zindagigames.com> - 2014-10-08 15:40 -0700
    Re: operator module functions Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-10-08 21:57 +1100
      Re: operator module functions Terry Reedy <tjreedy@udel.edu> - 2014-10-08 15:09 -0400
      Re: operator module functions Ethan Furman <ethan@stoneleaf.us> - 2014-10-08 12:38 -0700
      Re: operator module functions random832@fastmail.us - 2014-10-08 15:49 -0400
      Re: operator module functions Gelonida N <gelonida@gmail.com> - 2014-10-08 23:05 +0200
      Re: operator module functions Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-08 15:23 -0600
      Re: operator module functions Ethan Furman <ethan@stoneleaf.us> - 2014-10-08 14:49 -0700
      Re: operator module functions Chris Kaynor <ckaynor@zindagigames.com> - 2014-10-08 14:21 -0700
      Re: operator module functions Ben Finney <ben+python@benfinney.id.au> - 2014-10-09 08:57 +1100
      Re: operator module functions Terry Reedy <tjreedy@udel.edu> - 2014-10-08 18:46 -0400
      Re: operator module functions Ethan Furman <ethan@stoneleaf.us> - 2014-10-08 16:35 -0700
      Re: operator module functions Ned Batchelder <ned@nedbatchelder.com> - 2014-10-08 21:41 -0400

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