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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 read_transport(self):
 """ Read data from media transport. The returned data payload is SBC decoded and has all RTP encapsulation removed. :return data: Payload data that has been decoded, with RTP encapsulation removed. :rtype: array{byte} """

        if ('r' not in self.access_type):
            raise BTIncompatibleTransportAccessType
        return self.codec.decode(self.fd, self.read_mtu)