Python, 如何中途停止脚本？

Question

假设我有这个脚本：

import time

def menu():
    n = raw_input("What do you want the script to do: ").lower()
    if n == "run":
        r = run()
    elif n == "exit":
        exit()
    else:
        print("Unknown command")
    print("Result: " + r)    

def run():
    t = 0
    while t < 60:
        print("This script is doing some stuff")
        time.sleep(1)
        t = t + 1
    return "Some kind of result"

if __name__ == '__main__':
    print("Starting the most useless script ever")
    while True:
        menu()

如何在将 "This script is doing some stuff" 和 return 打印到 Menu() 时停止脚本？我不想完全退出程序，只是 return 到菜单。

Answer 1

关于这方面的事情：

while True:
    try:
        # whatever logic
        pass 
    except(KeyboardInterrupt):
        print 'Ctrl-C was pressed... interupt while loop.'
        break
print 'program still running'

Answer 2

您正在寻找的是信号库，您需要做的就是创建一个函数来处理它。

import signal

def a(sig_num, stack_frame):
    print("WORKS")

signal.signal(signal.SIGINT,a)

函数a必须有两个位置参数

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