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in Technique[技术] by (71.8m points)

python - When where and how can i change the __class__ attr of an object?

I'd like to be able to do:

>>> class a(str):
...     pass
...
>>> b = a()
>>> b.__class__ = str
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: __class__ assignment: only for heap types
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by (71.8m points)

I've solved it in this way:

>>> class C(str):
...     def __getattribute__(self, name):
...         if name == '__class__':
...             return str
...         else:
...             return super(C, self).__getattribute__(name)
...         
>>> c = C()
>>> c.__class__
<type 'str'>

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