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Date: Mon, 28 Oct 2013 23:23:32 +1100
Subject: Re: Python3 doc, operator reflection
From: Chris Angelico <rosuav@gmail.com>
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Xref: csiph.com comp.lang.python:57813

On Mon, Oct 28, 2013 at 11:00 PM, Johannes Bauer <dfnsonfsduifb@gmx.de> wro=
te:
>> There are no swapped-argument versions of these methods (to be used when=
 the left argument does not support the operation but the right argument do=
es); rather, __lt__() and __gt__() are each other=92s reflection, __le__() =
and __ge__() are each other=92s reflection, and __eq__() and __ne__() are t=
heir own reflection.
>
> But shouldn't __lt__ be the reflection or __ge__ and __gt__ the
> reflection of __le__?

lt is the negation of ge, but it's the reflection of gt. Consider this:

1 < 2
2 > 1

If Python can't ask 1 if it's less than 2, it'll ask 2 if it's greater than=
 1.

ChrisA