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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _swap(self, other):
 """Swap this config with another. This is used by the unit tests to swap the config to one that is shielded from any user config updates. Do not use this method unless you have good reason. """

        self.__dict__, other.__dict__ = other.__dict__, self.__dict__