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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 open_channel(self):
 """Open a new channel with RabbitMQ. When RabbitMQ responds that the channel is open, the on_channel_open callback will be invoked by pika. """

        logger.debug('Creating new channel')
        self._connection.channel(on_open_callback=self.on_channel_open)