[Python-Dev] instancemethod_getattro seems to be partially wrong

Christian Tismer tismer at tismer.com
Tue Nov 18 20:27:00 EST 2003


Guido van Rossum wrote:

...

> Here's an example of the difference:
> 
> class C:
>     def f(s): pass
>     f.__repr__ = lambda: "42"
> print C().f.__repr__()
> 
> This prints "42".  If you comment out the PyDescr_IsData() call, it
> will print "<bound method C.f of <__main__.C instance at 0x...>>".
> 
> I'm not entirely clear what goes wrong in your case.

Well, in my case, I try to pickle a bound method, so
I expect that C().f.__reduce__ gives me a reasonable
object: A method of an instance of C that is able to
do an __reduce__, that is, I need the bound f and try
to get its __reduce__ in a bound way.

If that's not the way to do it, which is it?

thanks - chris

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