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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 verifymessage(self, address, signature, message):
 """ Verifies that a message has been signed by an address. Args: address (str):
 address claiming to have signed the message signature (str):
 ECDSA signature message (str):
 plaintext message which was signed Returns: bool: True if the address signed the message, False otherwise """

        verified = self.rpc.call("verifymessage", address, signature, message)
        self.logger.debug("Signature verified: %s" % str(verified))
        return verified