code: def run(self, func, *func_args, **func__kwargs):
          
          self._func = func
          self._func_args = func_args
          self._func_kwargs = func__kwargs
          return self
docs: Specify the function to run at the scheduled times
  
          :param func:  a callable
          :param func_args:  the args to the callable
          :param func__kwargs: the kwargs to the callable
          :return: