Re: Pragmatics of the is operator

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Date	Sun, 27 Nov 2011 12:50:52 +1100
Subject	Re: Pragmatics of the is operator
From	Chris Angelico <rosuav@gmail.com>
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On Sun, Nov 27, 2011 at 12:42 PM, candide <candide@free.invalid> wrote:
> So, for the same reason, wouldn't it be better to use "if spam is True"
> against to "if spam == True"  (or better "if spam") ?
>

They're quite different. "if spam" will check the truthiness of spam -
it's equivalent to "if bool(spam) is True"; "if spam is True" checks
that it's actually a boolean. But I would recommend against the "==
True" form, as it's unclear which form you meant to use. (Others may
disagree.)

ChrisA

Thread

Pragmatics of the standard is() function candide <candide@free.invalid> - 2011-11-26 22:20 +0100
  Re: Pragmatics of the standard is() function Roy Smith <roy@panix.com> - 2011-11-26 16:32 -0500
  Re: Pragmatics of the standard is() function Chris Angelico <rosuav@gmail.com> - 2011-11-27 09:22 +1100
  Re: Pragmatics of the standard is() function Alexander Kapps <alex.kapps@web.de> - 2011-11-26 23:38 +0100
  Re: Pragmatics of the standard is() function Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-26 23:01 +0000
    Re: Pragmatics of the is operator candide <candide@free.invalid> - 2011-11-27 02:42 +0100
      Re: Pragmatics of the is operator Chris Angelico <rosuav@gmail.com> - 2011-11-27 12:50 +1100
      Re: Pragmatics of the is operator Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-27 03:13 +0000
    Re: Pragmatics of the standard is() function Den <patentsvnc@gmail.com> - 2011-11-28 11:22 -0800
      Re: Pragmatics of the standard is() function Ethan Furman <ethan@stoneleaf.us> - 2011-11-28 12:05 -0800
      Re: Pragmatics of the standard is() function alex23 <wuwei23@gmail.com> - 2011-11-28 19:58 -0800
      Re: Pragmatics of the standard is() function Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-29 08:41 +0000
        Re: Pragmatics of the standard is() function Den <patentsvnc@gmail.com> - 2011-11-29 09:11 -0800
  Re: Pragmatics of the standard is() function Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-11-28 13:57 +0100

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