Python 计时器秒钟、秒表

import time
  
print('按下回车开始计时，按下 Ctrl + C 停止计时。')
while True:
    
    input("") # 如果是 python 2.x 版本请使用 raw_input() 
    starttime = time.time()
    print('开始')
    try:
        while True:
            timing = round(time.time() - starttime,0)
            print('计时: ',round(time.time() - starttime,0),'秒',end="\r")
            time.sleep(1)
            if timing >= 10:
                starttime = time.time()
    except KeyboardInterrupt:
        print('结束')
        endtime = time.time()
        print('总共的时间为:',round(endtime - starttime,2),'secs')
        break