如何停止一个函数

Question

例如：

 def main():
    if something == True:
        player()
    elif something_else == True:
        computer()

def player():
    # do something here
    check_winner()  # check something
    computer()  # let the computer do something

def check_winner():
    check something
    if someone wins:
        end()

def computer():
    # do something here
    check_winner() # check something
    player() # go back to player function

def end():
    if condition:
        # the player wants to play again:
        main()
    elif not condition:
        # the player doesn't want to play again:
        # stop the program


    # whatever i do here won't matter because it will go back to player() or computer()

main()  # start the program

My problem is that if a certain condition becomes true (in the function check_winner ) and function end() it will go back to computer() or player() 因为没有一行告诉计算机停止执行 player() 或 computer() 。如何停止 Python 中的函数？

原文由 user3711671 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

一个简单的 return 语句将“停止”或返回函数；准确地说，它将函数执行“返回”到函数被调用的点——函数终止而无需进一步操作。

这意味着您可以在整个函数中的许多地方返回它。像这样：

 def player():
    # do something here
    check_winner_variable = check_winner()  # check something
    if check_winner_variable == '1':
        return
    second_test_variable = second_test()
    if second_test_variable == '1':
        return

    # let the computer do something
    computer()

原文由 Hektor 发布，翻译遵循 CC BY-SA 4.0 许可协议