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Progressbar in Python

A progressbar can be created in the terminal using Python. Developers often use a terminal, so you sometimes need some kind of interface.

A progressbar shows you how long the process is taking, there are several ways to show one (like modules), but you can code it manually.

In Python you can use the code below to create a progress bar:

# -*- coding: utf-8 -*-
import sys

# Print iterations progress
def print_progress(iteration, total, prefix='', suffix='', decimals=1, bar_length=100):
    Call in a loop to create terminal progress bar
        iteration   - Required  : current iteration (Int)
        total       - Required  : total iterations (Int)
        prefix      - Optional  : prefix string (Str)
        suffix      - Optional  : suffix string (Str)
        decimals    - Optional  : positive number of decimals in percent complete (Int)
        bar_length  - Optional  : character length of bar (Int)
    str_format = "{0:." + str(decimals) + "f}"
    percents = str_format.format(100 * (iteration / float(total)))
    filled_length = int(round(bar_length * iteration / float(total)))
    bar = '█' * filled_length + '-' * (bar_length - filled_length)

    sys.stdout.write('\r%s |%s| %s%s %s' % (prefix, bar, percents, '%', suffix)),

    if iteration == total:


This outputs a simple bar, something like:

|████████████████████████████████████████-------------------------| 40.0% %    

I shrunk the bar a bit because it didn't fit the screen, but it's the same idea. So you can make something like this:

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Top comments (1)

joaomcteixeira profile image
João M.C. Teixeira

Nice one! Very simple, yet very powerful implementation. Thanks