checking if two things do not equal None
greg.ewing at canterbury.ac.nz
Sun Mar 30 08:41:36 CEST 2014
Roy Smith wrote:
> But, if you show me
> a != None != b:
> my brain just goes into overload.
Chained comparisons get weird with not-equal operators.
If you see
a == b == c
then it implies that a == c, but
a != b != c
does *not* imply that a != c. At least it doesn't in
Python; I've never seen any mathematicians write that, so
I don't know what they would make of it.
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