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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 list_(self):
 """ Gets a list of channels on the server. """

        with self.lock:
            self.send('LIST')
            list_ = {}

            while self.readable():
                msg = self._recv(expected_replies=('322', '321', '323'))

                if msg[0] == '322':
                    channel, usercount, modes, topic = msg[2].split(' ', 3)
                    modes = modes.replace(':', '', 1).replace(':', '', 1)
                    modes = modes.replace('[', '').replace( \
                                                    ']', '').replace('+', '')
                    list_[channel] = usercount, modes, topic
                elif msg[0] == '321':
                    pass
                elif msg[0] == '323':
                    break

            return list_