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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:
 async def play(self, author, text_channel, query, index=None, stop_current=False, shuffle=False):
 """ The play command Args: author (discord.Member):
 The member that called the command text_channel (discord.Channel):
 The channel where the command was called query (str):
 The argument that was passed with the command index (str):
 Whether to play next or at the end of the queue stop_current (bool):
 Whether to stop the currently playing song shuffle (bool):
 Whether to shuffle the queue after starting """


        if self.state == 'off':
            self.state = 'starting'
            self.prev_queue = []
            await self.set_topic("")
            # Init the music player
            await self.msetup(text_channel)
            # Queue the song
            await self.enqueue(query, index, stop_current, shuffle)
            # Connect to voice
            await self.vsetup(author)

            # Mark as 'ready' if everything is ok
            self.state = 'ready' if self.mready and self.vready else 'off'
        else:
            # Queue the song
            await self.enqueue(query, index, stop_current, shuffle)

        if self.state == 'ready':
            if self.streamer is None:
                await self.vplay()