[Python-Dev] more on pickling
Christian Tismer
tismer at tismer.com
Mon Nov 17 17:46:47 EST 2003
Hi again,
trying to pickle bound python methods,
I'm now running into another problem.
It seems to give a problem when asking
for an attribute of a bound method:
>>> class a:
... def x(self): pass
>>> a.x # good so far
<unbound method a.x>
>>> a().x # very good
<bound method a.x of <__main__.a instance at 0x007A6CE8>>
>>> a.x.__reduce__ # naaaaah? Sounds bad
<built-in method __reduce__ of function object at 0x00792630>
>>> a().x.__reduce__ # very bad.
<built-in method __reduce__ of function object at 0x00792630>
>>> a.x.__reduce__==a().x.__reduce__
1
So I have the impression these methods loose their
relationship to their originating object.
Is this behavior by intent, i.e. is it impossible to write
a working __reduce__ method for a bound class method?
thanks again - chris
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