import cPickle
class Foo(object):
def __init__(self):
self._data = {'bar': 'baz'}
def __getattr__(self, name):
assert hasattr(self, '_data')
return self._data[name]
# I even had to define this just to stop KeyError: '__getstate__'
def __getstate__(self):
return self.__dict__
foo = Foo()
bar = cPickle.dumps(foo)
cPickle.loads(bar)
这会引发断言错误。为什么pickle.dumps调用__getattr__?
我想pickle
/cPickle
刚刚转成__dict__
倾倒当一个字符串,然后使用该字符串直接加载时设置的新对象的__dict__
。为什么dumps
需要拨打bar.__getattr__
?如何更改Foo
以避免这种情况?
移动回答。 –