python函数超时怎么自动退出？

pip3 install timeout-decorator

@timeout_decorator.timeout(5, timeout_exception=StopIteration)

@timeout_decorator.timeout(5, use_signals=False)

import timeout_decorator

@timeout_decorator.timeout(5)

def mytest():

    print("Start")

    for i in range(1, 10):

        time.sleep(1)

        print("{} seconds have passed".format(i))

def main():

    mytest()

if __name__ == '__main__':

main()