[Python-Dev] NotImplemented comparisons

[Georg Brandl]

Guido van Rossum schrieb:
> NonImplemented isn't treated as special when returned by __cmp__();
> __cmp__ is not considered a binary operator like __add__. (__lt__ and
> friends *do* get treated as such -- but instead of __rlt__ we use
> __gt__, etc.)

But if it's not treated as special, why doesn't the comparison raise an
exception, like when __cmp__ returns "foo", for example?

Georg

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