code: async def on_command_error(self, context, exception):
          
          if self.extra_events.get('on_command_error', None):
              return
  
          if hasattr(context.command, 'on_error'):
              return
  
          cog = context.cog
          if cog:
              if Cog._get_overridden_method(cog.cog_command_error) is not None:
                  return
  
          print('Ignoring exception in command {}:'.format(context.command), file=sys.stderr)
          traceback.print_exception(type(exception), exception, exception.__traceback__, file=sys.stderr)
docs: |coro|
  
          The default command error handler provided by the bot.
  
          By default this prints to ``sys.stderr`` however it could be
          overridden to have a different implementation.
  
          This only fires if you do not specify any listeners for command error.