python怎么让程序重复运行

while 1:

    run_ticker = 'python ticker.py'

    run_depth = 'python depth.py'

    run_depth_pct = 'python depth_pct.py'

    run_trade = 'python trade.py'

    os.system(run_depth_pct)

os.execvp(sys.executable, [sys.executable]+sys.argv)

python = sys.executable  # 获取当前执行python

 os.execl(python, python, *sys.argv)  # 执行命令

def restart():

     try:

         fun()

     except EOFError as e:

         print(e)

     finally:

         restart()