python实现adb命令循环

n = 1
while n < 6:
    cmd = 'adb shell am start -W -n com.sf.DarkCalculator/.MainActivity'
    content = os.popen(cmd)
    print('启动成功')

    for line in content.readlines():

        if "ThisTime" in line:
            StartTime = line.split(":")[1]
            break
    print("StartTime:%s" % StartTime)
    time.sleep(3)

    cmd = 'adb shell am force-stop com.sf.DarkCalculator'
    content = os.popen(cmd)
    print("关闭成功")
    n += 1