在python 3.x中返回/重新启动程序

Question

我的程序运行，并且在打印最终语句后立即退出。

如何将程序暂停约3秒钟，以便用户可以读取输出，然后让程序返回到程序的开头，或者只是将其返回到原始变量/问题（日期问题）？

def main():
    date = input("""Please enter today's date (mm/dd/yy): """)
    print()
    date_list = date.split('/')

    month_validate(date,date_list)

    day_validate(date,date_list)

    year_validate(date,date_list)

    long_date(date,date_list)

    ################################################

    def long_date(date,date_list):
    month = int(date_list[0])
    day = int(date_list[1])
    year = int(date_list[2])
    print(date,' has been accepted \n')

    while month >= 1 and month <= 12:
        if month == 1:
            print('Date: January',day,',',year)
            return date
        elif month == 2:
            print('Date: February',day,',',year)
        elif month == 3:
            print('Date: March',day,',',year)
        elif month == 4:
            print('Date: April',day,',',year)

Answer 1

由于您的程序似乎已经被封装在一个main函数中，而不是只调用一次，所以基本上只需要继续在循环中运行即可：

while True:
    main()

    # sleep here, or maybe ask the user if they want to repeat
    time.sleep(3)

Answer 2

使用time.sleep（seconds）函数。

import time
#where you want to pause
time.sleep(3)
#then if you want to restart at the begnining:
main()