Amaury Forgeot d'Arc <[email protected]> added the comment:
This is precisely documented here:
http://docs.python.org/library/pickle.html#object.__setstate__
"Note: For new-style classes, if __getstate__() returns a false value,
the __setstate__() method will not be called."
If you want some default value even when the state is empty, you could
set it in the __new__ method:
[__new__ is always called, but __init__ is skipped by the copy protocol]
class A(object):
def __new__(cls):
self = super(cls, A).__new__(cls)
self.a = 1
return self
def __setstate__(self, d):
self.__dict__.update(d)
def __getstate__(self):
d = self.__dict__.copy()
d.pop('a')
return d
The __setstate__ is even not necessary here, since it implements the
default behaviour.
----------
nosy: +amaury.forgeotdarc
resolution: -> works for me
status: open -> pending
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Python tracker <[email protected]>
<http://bugs.python.org/issue6827>
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