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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 ignore(self, ctx):
 """Handles the bot's ignore lists. To use these commands, you must have the Bot Admin role or have Manage Channels permissions. These commands are not allowed to be used in a private message context. Users with Manage Roles or Bot Admin role can still invoke the bot in ignored channels. """

        if ctx.invoked_subcommand is None:
            await self.bot.say('Invalid subcommand passed: {0.subcommand_passed}'.format(ctx))