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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 encode(self, delimiter=';'):
 """Encode a command string from message."""

        try:
            return delimiter.join([str(f) for f in [
                self.node_id,
                self.child_id,
                int(self.type),
                self.ack,
                int(self.sub_type),
                self.payload,
            ]]) + '\n'
        except ValueError:
            _LOGGER.error('Error encoding message to gateway')