当您不想中断时，如何在python 3中使用for循环else语句？

Question

Is this the best way to execute the following code or is there a way to do it with an else statement after the for loop?

moved = False
for action in actions:
    if action.type == KEY:
        moved = True
        if action.key == UP:
            move_forward()
        update_all()
if not moved:
    update_all()

Answer 1

For that specific piece of code you could reduce to:

for action in actions:
    if action.type == KEY and action.key == UP:
        move_forward()
update_all()

Since you're always updating, even if your action is not of type KEY.

Answer 2

If there's any reason to update all, do it at the end after the for each loop

moved = False
for action in actions:
    if (action.type == KEY and action.key == UP):
        moved = True
        move_forward()
update_all()