Python progressbar does not display

Question

I've got this function that takes some time to complete and I'd like to display the current progress per element in the list.

This is how it's coded:

import progressbar

def func(self):
    bar = progressbar.ProgressBar(
        maxval=len(some_list),
        widgets=[progressbar.Bar('=', '[', ']'), ' ', progressbar.Percentage()]
    )
    progress = 0
    bar.start()
    for r in some_list:
        #heavy calculation
        progress += 1
        bar.update(progress)
    bar.finish()

Yet when I run, the progressbar isn't displayed (nothing in fact is), the function just does its thing and when the function ends 20 seconds later I suddenly get the full bar in the console

What am I doing wrong?

I'm using Kubuntu latest version with python 3.7.4 and PyCharm.

try flushing stdout. If that fixes it, it's an output buffering issue. You'll have to use the python2 approach from: https://stackoverflow.com/questions/230751/how-to-flush-output-of-print-function. For example, try flushing after every bar update — sshashank124, Dec 27 '19 at 15:42
It would be good if you link what `progressbar` module you are using. There are more than one implementation floating around. — accdias, Dec 27 '19 at 15:53

score 3 · Answer 1 · answered Dec 27 '19 at 15:43

3

Consider running it not from an IDE, sometimes they get a messy std output. Just run it with plain python like this:

python3 your_script.py

answered Dec 27 '19 at 15:43

marcos

4,253
1
9
20

Indeed, seems like the issue is purely PyCharm since it works perfectly in the console – Wouter Vandenputte Dec 27 '19 at 15:45

Python progressbar does not display

1 Answers1