如何每次重置全局值？

Question

def playAgain():
    b = input('Do you want to play again? y/n')
    if b == ('y'):
        def startGame():
            startGame()
    else:
        print('Goodbye!')
        time.sleep(1)
        sys.exit()
import random
import time
import sys

global shots
shots = 0


while shots <=5:
    chanceofDeath =random.randint(1,6)
    input('press enter to play Russian roulette.')
    if chanceofDeath ==1:
        shots = shots + 1
        print (shots)
        print('You died.')
        time.sleep(1)
        playAgain()
    else:
        shots = shots + 1
        print (shots)
        print ('click')


    if shots == 5:
        print('You won without dying!')
        time.sleep(1)
        playAgain()

当我运行程序时，当它要求再次播放时，如果你选择是，它可以工作，但从最后一次拍摄开始。例如，如果您在第二次拍摄中死亡并再次播放，而不是重新开始，它将立即从3开始。如何每次重置镜头？

Answer 1

它继续上一次拍摄的原因是因为你从未真正将'镜头'设置回0代码：

import random
import time
import sys

global shots
shots = 0

只运行一次，这意味着镜头永远不会被分配回0。

你想要的是如果用户选择再次播放，'shots'变量应该设置为0.如果用户想再次播放，你可以编辑你的playAgain（）函数返回True。例如：

def playAgain():
    b = input('Do you want to play again? y/n')
    if b == ('y'):
        return True
    else:
        print('Goodbye!')
        time.sleep(1)
        sys.exit()

这允许您检查用户是否想要在主while循环中再次播放并将'shots'设置为0，如下所示：

if playAgain():
    shots = 0

同样，在任何函数之外声明镜头，而while循环是唯一使用它的东西，它不需要被定义为全局变量。

修订计划

def playAgain():
    b = input('Do you want to play again? y/n')
    if b == ('y'):
        return True
    else:
        print('Goodbye!')
        time.sleep(1)
        sys.exit()

import random
import time
import sys

shots = 0


while shots <=5:
    chanceofDeath =random.randint(1,6)
    input('press enter to play Russian roulette.')
    if chanceofDeath ==1:
        shots = shots + 1
        print (shots)
        print('You died.')
        time.sleep(1)

        if playAgain():
            shots = 0

    else:
        shots = shots + 1
        print (shots)
        print ('click')

    if shots == 5:
        print('You won without dying!')
        time.sleep(1)

        if playAgain():
            shots = 0 

此外，我不确定您希望代码如何处理以下内容：

def startGame():
    startGame()

希望这有帮助