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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 connection_lost(self, exc):
 """Reestablish the connection to the transport. Called when asyncio.Protocol loses the network connection. """

        if exc is None:
            _LOGGER.warning('End of file received from Insteon Modem')
        else:
            _LOGGER.warning('Lost connection to Insteon Modem: %s', exc)

        self.transport = None
        asyncio.ensure_future(self.pause_writing(), loop=self.loop)

        if self._connection_lost_callback:
            self._connection_lost_callback()