如何打破这个while循环？

Question

def left():
    print("left")
def right():
    print("right")
def main():
    command = input ("Enter your command: ")
    if command == "left":
        left()
    if command == "right":
        right()
    if command ==  "done":
        break
while True:
    main()

我不明白如何在调用主 function 时跳出这个 while 循环。我试图在调用 function main() 时跳出 while 循环。

Answer 1

function 上的中断对您的 while 循环没有影响，请尝试返回True并检查每次迭代的返回值：

def main():
    command = input ("Enter your command: ")
    if command == "left":
        left()
    elif command == "right":
        right()
    elif command ==  "done":
        return True
while True:
    if main():
        break

Answer 2

Pedro Maia 的答案是最好的，但如果您确定将结束您的进程并且不会以任何方式泄漏 memory，您也可以调用exit() 。

def main():
    command = input ("Enter your command: ")
    if command == "left":
        left()
    elif command == "right":
        right()
    elif command ==  "done":
        exit()

while True:
    main():