如何只清除python输出控制台中的最后一行？

Question

我想从输出控制台窗口只清除最后几行。为了达到这个目的，我决定使用创建秒表，并且我已经实现了在键盘中断和输入键按下它创建圈，但我的代码只创建圈一次，我目前的代码是清除整个输出屏幕。

clear.py

import os 
import msvcrt, time 
from datetime import datetime 
from threading import Thread 

def threaded_function(arg): 
    while True: 
     input() 

lap_count = 0 
if __name__ == "__main__": 
    # thread = Thread(target = threaded_function) 
    # thread.start() 
    try: 
     while True: 
      t = "{}:{}:{}:{}".format(datetime.now().hour, datetime.now().minute, datetime.now().second, datetime.now().microsecond) 
      print(t) 
      time.sleep(0.2) 
      os.system('cls||clear') # I want some way to clear only previous line instead of clearing whole console 
      if lap_count == 0: 
       if msvcrt.kbhit(): 
        if msvcrt.getwche() == '\r': # this creates lap only once when I press "Enter" key 
         lap_count += 1 
         print("lap : {}".format(t)) 
         time.sleep(1) 
         continue    
    except KeyboardInterrupt: 
     print("lap stop at : {}".format(t)) 
     print(lap_count) 

，当我在我的IPython shell中运行

%run <path-to-script>/clear.py 

我可以只创建一个圈，但它没有停留永久。

Answer 1

如果您打算从控制台输出删除某一行，

print "I want to keep this line" 
print "I want to delete this line", 
print "\r " # this is going to delete previous line 

或

print "I want to keep this line" 
print "I want to delete this line\r "