[EMAIL PROTECTED] writes:
> Ben Finney wrote:
>> Is there some behaviour other than "evaluate to False" or "raise an
>> exception", that could indicate "not comparable"?
>
> Yes: return NotImplemented. Note that the == operator automagically
> returns False in this case.
>
> >>> "spam".__eq__("spam")
> True
> >>> "spam".__eq__("ham")
> False
> >>> "spam".__eq__(23)
> NotImplemented
>
> This way, the user could explicitly call __eq__ and check for
> NotImplemented if he desires the exceptional behavior.
Thanks, I was unaware of the standard usage of NotImplemented. That
seems like a sensible solution.
<URL:http://docs.python.org/ref/types.html#l2h-29>
--
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`\ Unless there are three other people." -- Orson Welles |
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Ben Finney
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