[BUG] progress bar: bogus estimations

[nschloe]

The computation of the remaining time often produces bogus results for me. Here, when nesting two progress bars, I'm even getting negative times. MWE:

from rich.progress import Progress
import time

m = 10
n = 5

with Progress() as progress:
    task1 = progress.add_task("Overall", total=m)
    task2 = progress.add_task("Kernels", total=n)

    for _ in range(m):
        progress.update(task2, completed=0)
        for j in range(n):
            time.sleep(2 ** j)
            progress.update(task2, advance=1)
        progress.update(task1, advance=1)

[willmcgugan]

Are you adjusting the total after the task is started?

I'll need to see code to diagnose this.

[nschloe]

@willmcgugan Added MWE to the original post.

[willmcgugan]

Can you try with the latest version please.

[nschloe]

This is with

python3 -c 'from importlib import metadata; print(metadata.version("rich"))'

9.0.1

Or do you mean master?

[willmcgugan]

It's because completed is going backwards. Replace progress.update(task2, completed=0) with progress.reset(task2).

I'll look in to doing an automatic reset when the value completed goes backwards.

[nschloe]

That fixes it, thanks. Should I leave this open?

[willmcgugan]

Great. Yes, leave it open for now.

[willmcgugan]

Fixed in 9.1.0. Progress.reset is still the recommended way though.