Cell output flashes when using fastprogress package (was: cell output erased after execution/model training is complete.)

[agigao]

Bug: Notebook Editor, Interactive Window, Editor cells

Hi guys,

I'd love to use VSCode for my Data Science endeavours but this break the workflow:

Progress bar generated report gets erased after it's finished, not very convenient when training models:

Steps to Reproduce:

1. pip install fastprogress
2. open a new notebook in VSCode and run the snippet

from fastprogress.fastprogress import master_bar, progress_bar
from time import sleep
mb = master_bar(range(10))
for i in mb:
    for j in progress_bar(range(100), parent=mb):
        sleep(0.01)
        mb.child.comment = f'second bar stat'
    mb.main_bar.comment = f'first bar stat'
    mb.write(f'Finished loop {i}.')
    #mb.update_graph(graphs, x_bounds, y_bounds)

Finished Loop 0, 1, 2...

Does this issue occur when all extensions are disabled?: Yes

• VSCode Version:

Version: 1.47.2
Commit: 17299e413d5590b14ab0340ea477cdd86ff13daf
Date: 2020-07-15T18:22:15.161Z
Electron: 7.3.2
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Linux x64 5.4.0-42-generic

• OS Version:

Operating System: Linux Mint 20
Kernel: Linux 5.4.0-42-generic
Architecture: x86-64

• Python

Version 3.8.2
Anaconda? - Nope

Cheers,
Giga

Microsoft Data Science for VS Code Engineering Team: @rchiodo, @IanMatthewHuff, @DavidKutu, @DonJayamanne, @greazer, @joyceerhl

[claudiaregio]

Hi @agigao , is it the progress bar being deleted that bothers you or the execution time being deleted that bothers you?

[agigao]

@claudiaregio hi, well the execution report: error rate, validation loss, etc.

[claudiaregio]

@agigao To make sure I'm understanding correctly, when you use this command in another tool it does not clear the output of those stats, it just shows them? Does not require a print statement to view them?

[claudiaregio]

@agigao I was able to validate that that is the behavior in different tools.

[agigao]

@claudiaregio it isn't erased in a regular jupyter notebook.

[claforte]

FYI, I tried to work-around the issue using:

import fastprogress
fastprogress.fastprogress.master_bar, fastprogress.fastprogress.progress_bar = \
    fastprogress.fastprogress.force_console_behavior()
fastprogress.fastprogress.workaround_empty_console_output()

... but unfortunately that doesn't help. It would be fantastic if this could be fixed... this is the #1 issue preventing me from switching from "Jupyter notebook" to vscode's.

[DonJayamanne]

@claforte
This issue has been resolved in Native notebooks
Please have a look at native notebooks (a better UI for editing of Notebooks):

• Please install VS Code insiders & you'll get it automatically
• Please understand some of the features might not yet be available (variable viewer, run by line, etc)
• See here for more information https://devblogs.microsoft.com/python/notebooks-are-getting-revamped/

Apologies, this has n't been resolved in native notebooks either.

[claforte]

Thanks DonJayamanne, for me the priority isn't as high now that I tried the native notebooks. The fastai library tends to output a report at the end, after the fastprogress messages are shown. With the old notebooks, that report wouldn't appear.

I just tried it in native notebooks today, and while the fastprogress disappears, at least this time I see the resulting dataframe/report, so it's more usable:

[DonJayamanne]

Thanks for trying that, if i'm not mistaken this (Native Notebooks UX) is more inline with what Juptyer does (see Jupyter output here #1674 (comment))

[claforte]

Yes, at this point, the only remaining issue is that the Native Notebooks UX keeps resizing/flashing while the fastprogress is shown. But it's just annoying, not a showstopper. Thank you!

[DonJayamanne]

@claforte I'm going to close this issue as it now works as expected.

remaining issue is that the Native Notebooks UX keeps resizing/flashing while the fast

I'll file a seprate issue for this.