Using non-ascii symbols

Steven D'Aprano steve at
Wed Jan 25 18:23:11 EST 2006

On Wed, 25 Jan 2006 11:14:06 -0500, Peter Hansen wrote:

> I think "not equal", at least the way our brains handle it in general, 
> is not equivalent to "less than or greater than".
> That is, I think the concept "not equal" is less than or greater than 
> the concept "less than or greater than".  <wink>

For objects that don't have total ordering, "not equal" != is not the
same as "less than or greater than" <>.

The two obvious examples are complex numbers, where C1 != C2 can be
evaluated, but C1 <> C2 is not defined, and NaNs, where NaN != NaN is
always true but NaN <> NaN is undefined.


More information about the Python-list mailing list