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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Python Basic Doubt
Date: Sat, 10 Aug 2013 21:25:36 -0400
References: <CAL0E0u6wO_UBniWoSpePvhKhPDG_nf4p1rqYYrGwzoHTqp6ZHA@mail.gmail.com> <20130810114040.6ac78fe8@bigbox.christie.dr> <52067FDA.2030908@gmail.com> <5206B527.6080700@islandtraining.com> <CAPTjJmoM=MU2eqa2i_5_RbveXMqScQqu_uFjonwdrZX7Vsc49g@mail.gmail.com> <5206DDED.8030506@islandtraining.com>
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Xref: csiph.com comp.lang.python:52341

On 8/10/2013 8:42 PM, Gary Herron wrote:

> But for each of your examples, using "==" is equivalent to using "is".
> Each of
>      if something == None
>      if device == _not passed
>      if device != None
> would all work as expected.  In none of those cases is "is" actually
> needed.

class EqualAll:
     def __eq__(self, other): return True

ea = EqualAll()
print(ea == None)
print(ea == float('nan'))
 >>>
True
True

-- 
Terry Jan Reedy