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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 create(self, parties):
 """Create the barrier for the given number of parties. Parameters: parties(int):
 The number of parties to wait for. Returns: bool: Whether or not the new barrier was successfully created. """

        assert parties > 0, "parties must be a positive integer."
        return self.backend.add(self.key, parties, self.ttl)