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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 has_public(self):
 """Whether this JWK has an asymmetric Public key."""

        if self.is_symmetric:
            return False
        reg = JWKValuesRegistry[self._params['kty']]
        for value in reg:
            if reg[value].public and value in self._key:
                return True