richcmpfunc semantics

[harold fellermann]

Thank you Greg,

I figured most of it out in the meantime, myself. I only differ
from you in one point.

>> What has to be done, if the function is invoked for an operator
>> I don't want to define?
>
> Return Py_NotImplemented. (Note that's return, *not* raise.)

I used

PyErr_BadArgument();
return NULL;

instead. What is the difference between the two and which one
is to prefer. Also, do you need to increment the reference count
of Py_NotImeplemented before returning it?

Thanks,

- harold -

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Pigs treat us as equal.
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