移除和更换印刷品 [英] Remove and Replace Printed items

问题描述

我想知道是否可以删除您在 Python 中打印的项目——不是从 Python GUI，而是从命令提示符.例如

I was wondering if it was possible to remove items you have printed in Python - not from the Python GUI, but from the command prompt. e.g.

a = 0  
for x in range (0,3):  
    a = a + 1  
    b = ("Loading" + "." * a)
print (a)

所以它打印

>>>Loading   
>>>Loading. 
>>>Loading.. 
>>>Loading...

但是，我的问题是我希望这一切都在一行上，因此当其他事情出现时它会自行删除.因此，不是打印 "Loading", "Loading.", "Loading... 我希望它打印 "Loading."，然后它会删除线上的内容并用 "Loading.." 替换它，然后删除 "Loading.." 并用 "Loading..." 替换它(在同一行).这有点难以描述.

But, my problem is I want this all on one line, and for it it remove it self when something else comes along. So instead of printing "Loading", "Loading.", "Loading... I want it to print "Loading.", then it removes what is on the line and replaces it with "Loading.." and then removes "Loading.." and replaces it (on the same line) with "Loading...". It's kind of hard to describe.

ps 我曾尝试使用退格字符，但它似乎不起作用 ("\b")

p.s I have tried to use the Backspace character but it doesn't seem to work ("\b")

谢谢

推荐答案

使用 CR 到行首即可.

Just use CR to go to beginning of the line.

import time
for x in range (0,5):  
    b = "Loading" + "." * x
    print (b, end="\r")
    time.sleep(1)

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