[Python-Dev] NotImplemented reaching top-level

Sun Dec 25 12:37:53 CET 2005

Armin Rigo wrote:
> Hi Facundo,
>> On Sat, Dec 24, 2005 at 02:31:19PM -0300, Facundo Batista wrote:
>> >>> d += 1.2
>> >>> d
>> NotImplemented
>> The situation appears to be a mess. Some combinations of specific
> operators fail to convert NotImplemented to a TypeError, depending on
> old- or new-style-class-ness, although this is clearly a bug (e.g. in an
> example like yours but using -= instead of +=, we get the correct
> TypeError.)
>> Obviously, we need to write some comprehensive tests about this. But
> now I just found out that the old, still-pending SF bug #847024 about
> A()*5 in new-style classes hasn't been given any attention; my theory is
> that nobody fully understands the convoluted code paths of abstract.c
> any more :-(

Time for a rewrite?
Reinhold
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