checking if two things do not equal None

Terry Reedy tjreedy at udel.edu
Sun Mar 30 00:02:08 CET 2014


On 3/29/2014 2:56 PM, contact.trigon at gmail.com wrote:
> if (a, b) != (None, None):
> or
> if a != None != b:
>
> Preference? Pros? Cons? Alternatives?

if a is not None is not b
==
if a is not None and None is not b
==
if a is not None and b is not None
which is what I would write if not trying to be cute.
a < x < b is more readable as a chained comparison than the double is not.

-- 
Terry Jan Reedy




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