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Fri Mar 19 13:05:51 EST 2004 · https://mail.python.org/pipermail/python-dev/2004-March/043300.html

On Fri, 2004-03-19 at 12:59, Michael Chermside wrote:

>   Identity Objects can be (meaningfully) compared by:
> 
>     * Object Identity
>         To see if these are "the same object". Also useful
>         for low-level memory stuff according to Tim.
>         (just use '==', although 'is' would work too)

Using == for identity objects is the wrong thing.  We should discourage
tests like "if obj == None" in favor of "if obj is None".

-Barry

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[Python-Dev] redefining is