How to make a commandline statusbar that is 'updated' in Python

I don't know the right terms, so it is a bit hard to search how I can achieve this.

Commandline programs normally just print lines of text. Sometimes however, the text is updated. Good examples are git pull or wget.

As example:

[>   ]  25%
[->  ]  50%
[--> ]  75%
[--->] 100%

But then on the same line changing over time.

How can I make this kind of thing in Python? It doesn't have to be more complicated than this, I just want to make status bars...

(I want this to work at least on Ubuntu, but cross-platform is the nicest开发者_JAVA百科.)

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The magic is in \r character, a.k.a. carriage return, a.k.a. go back to the beginning of the current line.

from __future__ import print_function
import time    

for i in xrange(1, 100):
    print('[{0:10}]'.format('-' * (i / 10)), end = '\r')
    time.sleep(0.1)

There are also more advanced ways to manage the output to the console (through Console API on Windows, or ANSI escape codes) — they allow you to freely move the cursor and change text attributes like colour.

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How about the progressbar package?

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print "progress text\r",

Notice the trailing comma which suppresses new line.

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This Code also works in Google Colab

import time
for i in range(1, 101):
    print('-'  , end = ' ')
    print(i  , end = ' ')
    time.sleep(0.5)
    print('\r',end = ' ')
print('-'  , end = ' ')
print(i  , end = ' ')