[Python-Dev] Please comment on PEP 357 -- adding nb_index slot to PyNumberMethods
oliphant.travis at ieee.org
Sat Feb 18 00:38:16 CET 2006
Thomas Wouters wrote:
> On Fri, Feb 17, 2006 at 05:29:32PM +0100, Armin Rigo wrote:
>>> Where obj must be either an int or a long or another object that has the
>>> __index__ special method (but not self).
>>The "anything but not self" rule is not consistent with any other
>>special method's behavior. IMHO we should just do the same as
Agreed. I implemented the code, then realized this possible recursion
problem while writing the specification. I didn't know how it would be
It is easy enough to require __index__ to return an actual Python
integer because for anything that has the nb_index slot you would just
return obj.__index__() instead of obj.
I'll change the PEP and the implementation. I have an updated
implementation that uses the ssize_t patch instead.
There seem to be some issues with the ssize_t patch still, though.
Shouldn't a lot of checks for INT_MAX be replaced with PY_SSIZE_T_MAX.
But, I noticed that PY_SSIZE_T_MAX definition in pyport.h raises errors.
I don't think it even makes sense.
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