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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 verify(self, msg, sig, key):
 """ Verifies whether sig is the correct message authentication code of data. :param msg: The data :param sig: The message authentication code to verify against data. :param key: The key to use :return: Returns true if the mac was valid otherwise it will raise an Exception. """

        try:
            h = hmac.HMAC(key, self.algorithm(), default_backend())
            h.update(msg)
            h.verify(sig)
            return True
        except:
            return False