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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 recv(self, timeout=None):
 """Receive a handover select message from the remote server."""

        message = self._recv(timeout)
        if message and message.type == "urn:nfc:wkt:Hs":
            log.debug("received '{0}' message".format(message.type))
            return nfc.ndef.HandoverSelectMessage(message)
        else:
            log.error("received invalid message type {0}".format(message.type))
            return None