How to do nested progress bars?

[brando90]

e.g. tqdm has some: https://github.com/tqdm/tqdm#nested-progress-bars

[wolph]

Thanks to @paulo-raca we have a basic version of a multi-bar: https://github.com/WoLpH/python-progressbar/pull/208

But the proper version, similar to what tqdm has isn't there yet: https://github.com/WoLpH/python-progressbar/issues/189 I've made a basic attempt some time ago but it is not a trivial fix and I'm just too limited in time to get into it any time soon. It's really high on my wishlist though...

[stale[bot]]

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[wolph]

I've properly added the feature of multiple progressbars now. The approach is a bit different from tqdm but I personally think this is a more obvious (although slightly more verbose) approach.

The MultiBar can be used both using a with MultiBar() as multibar: and using a regular instance. You can manually render on demand using multibar.render() if you already have a display loop. If you want to have it render in the background you can use multibar.start() to run it as a background thread.

I'm still testing with it but I believe it works quite well. Usage: https://github.com/wolph/python-progressbar#multiple-threaded-progressbars

import random
import threading
import time

import progressbar

BARS = 5
N = 50


def do_something(bar):
    for i in bar(range(N)):
        # Sleep up to 0.1 seconds
        time.sleep(random.random() * 0.1)

        # print messages at random intervals to show how extra output works
        if random.random() > 0.9:
            bar.print('random message for bar', bar, i)


with progressbar.MultiBar() as multibar:
    for i in range(BARS):
        # Get a progressbar
        bar = multibar[f'Thread label here {i}']
        # Create a thread and pass the progressbar
        threading.Thread(target=do_something, args=(bar,)).start()

You can add your custom progressbars to a MultiBar instance like this:

multi['Some label'] = your_progress

[wolph]

The new version with nested progressbar support has been released :)