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28 lines
1.0 KiB
Python
28 lines
1.0 KiB
Python
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class EzPickle(object):
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"""Objects that are pickled and unpickled via their constructor
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arguments.
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Example usage:
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class Dog(Animal, EzPickle):
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def __init__(self, furcolor, tailkind="bushy"):
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Animal.__init__()
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EzPickle.__init__(furcolor, tailkind)
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...
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When this object is unpickled, a new Dog will be constructed by passing the provided
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furcolor and tailkind into the constructor. However, philosophers are still not sure
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whether it is still the same dog.
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This is generally needed only for environments which wrap C/C++ code, such as MuJoCo
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and Atari.
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"""
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def __init__(self, *args, **kwargs):
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self._ezpickle_args = args
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self._ezpickle_kwargs = kwargs
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def __getstate__(self):
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return {"_ezpickle_args" : self._ezpickle_args, "_ezpickle_kwargs": self._ezpickle_kwargs}
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def __setstate__(self, d):
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out = type(self)(*d["_ezpickle_args"], **d["_ezpickle_kwargs"])
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self.__dict__.update(out.__dict__)
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