human
I wrote the below code

    if (not hasattr(task_that_delegates, 'subtasks')):
        raise AttributeError(('%s    needs    to    implement    the    method    "subtasks"' % task_that_delegates))
    @task._task_wraps(task_that_delegates)
    class Wrapped(task_that_delegates, ):
        def deps(self):
            return (task.flatten(self.requires()) + task.flatten([t.deps() for t in task.flatten(self.subtasks())]))
        def run(self):
            for t in task.flatten(self.subtasks()):
                t.run()
            task_that_delegates.run(self)
    return Wrapped

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def delegates(task_that_delegates):