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From: Johannes Bauer <dfnsonfsduifb@gmx.de>
Newsgroups: comp.lang.python
Subject: Re: Python3 doc, operator reflection
Date: Mon, 28 Oct 2013 13:45:58 +0100
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Am 28.10.2013 13:23, schrieb Chris Angelico:
> On Mon, Oct 28, 2013 at 11:00 PM, Johannes Bauer <dfnsonfsduifb@gmx.de> wrote:
>>> 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 does); rather, __lt__() and __gt__() are each other’s reflection, __le__() and __ge__() are each other’s reflection, and __eq__() and __ne__() are their 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.

Ah, I see. Thanks for clearing that up!

Best regards,
Joe