Hi,
Can I force the pickling/unpickling mechanism to call the class
constructor? I thought __getinitargs__ would do the job, but the
following shows it does not.
[color=blue][color=green][color=darkred]
>>> class Test(object):[/color][/color][/color]
def __init__(self, **kwargs):
super(Test, self).__init__( **kwargs)
self.__dict__.u pdate(kwargs)
def __getinitargs__ (self):
print "Calling __getinitargs__ ."
return ()
def __getattr__(sel f, attrib):
print "Getting %s." % attrib
raise AttributeError
[color=blue][color=green][color=darkred]
>>> a = Test(name = None)
>>> s = pickle.dumps(a)[/color][/color][/color]
Getting __getstate__.
Getting __slots__.[color=blue][color=green][color=darkred]
>>> b = pickle.loads(s)[/color][/color][/color]
Getting __setstate__.[color=blue][color=green][color=darkred]
>>>[/color][/color][/color]
I thought unpickling with __getinitargs__ present would go as:
1. Call class constructor with args read from pickle and return inst.
2. Update inst by either calling __setstate__ (if there is) or just
update inst.__dict__.
What am I missing?
With my best regards,
G. Rodrigues
Can I force the pickling/unpickling mechanism to call the class
constructor? I thought __getinitargs__ would do the job, but the
following shows it does not.
[color=blue][color=green][color=darkred]
>>> class Test(object):[/color][/color][/color]
def __init__(self, **kwargs):
super(Test, self).__init__( **kwargs)
self.__dict__.u pdate(kwargs)
def __getinitargs__ (self):
print "Calling __getinitargs__ ."
return ()
def __getattr__(sel f, attrib):
print "Getting %s." % attrib
raise AttributeError
[color=blue][color=green][color=darkred]
>>> a = Test(name = None)
>>> s = pickle.dumps(a)[/color][/color][/color]
Getting __getstate__.
Getting __slots__.[color=blue][color=green][color=darkred]
>>> b = pickle.loads(s)[/color][/color][/color]
Getting __setstate__.[color=blue][color=green][color=darkred]
>>>[/color][/color][/color]
I thought unpickling with __getinitargs__ present would go as:
1. Call class constructor with args read from pickle and return inst.
2. Update inst by either calling __setstate__ (if there is) or just
update inst.__dict__.
What am I missing?
With my best regards,
G. Rodrigues