On Mon, 19 May 2008 12:39:36 -0700, destroooooy wrote:
> I'm wondering what is the canonical usage of the keywords 'is' and
> 'not' when you're writing conditionals and loops. The one I've been
> following is completely arbitrary--I use the symbols '==', '!=' for
> numerical comparisons and the words 'is', 'not' for everything else.
That's wrong. Use ``==`` and ``!=`` for testing equality/inequality and
``is`` and ``is not`` for identity testing. And testing for identity is
quite rare. Rule of thumb: Use it only for known singletons like `None`.
Ciao,
Marc 'BlackJack' Rintsch
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