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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 set_states(self, states):
 """Sets updater states."""

        states = pickle.loads(states)
        if isinstance(states, tuple) and len(states) == 2:
            self.states, self.optimizer = states
        else:
            self.states = states
        self.states_synced = dict.fromkeys(self.states.keys(), False)