清除Python

Question

所以，我是Python和编程的超级新手。我还在学习最基本的命令和术语。我的问题是我试图在无限循环中打印日期时间，但只在一行上。

我希望shell中的输出显示日期和时间，然后清除先前显示的日期时间并将其替换为新值。我似乎无法弄清楚我错过了什么，并通过阅读不同的问题，我似乎无法找到我正在寻找的东西。任何想法，帮助或指导将不胜感激。在这一点上，尝试阅读Python文档并没有帮助我。这是我到目前为止所发现的：

import datetime
import time

while True:
    today = datetime.date.today()
    now = datetime.datetime.now()
    print ("The Current date is ", (today.strftime('%m/%d/%Y')))
    print ("The Current Time is ", (now.strftime('%H:%M')))
    time.sleep(30)

这生成：

The Current date is  03/28/2017
The Current Time is  19:09
The Current date is  03/28/2017
The Current Time is  19:10

我想说：

The Current date is  03/28/2017
The Current Time is  19:09

然后，删除上面的文字并替换为

The Current date is  03/28/2017
The Current Time is  19:10

日期时间屏幕截图

Answer 1

一种方法是使用ANSI escape sequences：

import datetime
import time
import sys

while True:
    today = datetime.date.today()
    now = datetime.datetime.now()
    print ("The Current date is ", (today.strftime('%m/%d/%Y')))
    print ("The Current Time is  ", (now.strftime('%H:%M')))
    sys.stdout.write("\033[F") # Cursor up one line
    sys.stdout.write("\033[F") # Cursor up one line
    time.sleep(30)

另一种选择：

导入日期时间 进口时间 import os

while True:
    today = datetime.date.today()
    now = datetime.datetime.now()
    print ("The Current date is ", (today.strftime('%m/%d/%Y')))
    print ("The Current Time is ", (now.strftime('%H:%M')))
    time.sleep(30)
    os.system('clear')