Progress bar display does not update

[durana]

Description

I found with the latest version on PyPI, 3.35.0, that a progress bar's display does not get updated until the end when it is finished. I tested with the 3.34.3 version from PyPI, and this version updates the progress bar's display as expected.

Code

#!/usr/bin/env python

import time
import progressbar

bar = progressbar.ProgressBar()
for i in bar(range(100)):
    time.sleep(0.02)

Versions

• Python version:

3.6.4 |Anaconda, Inc.| (default, Jan 16 2018, 12:04:33) 
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)]

• Python distribution/environment: Anaconda
• Operating System: macOS
• Package version: 3.35.0

[JoeSc]

I have the same issue, simple example like

import time
import progressbar

bar = progressbar.ProgressBar()
for i in bar(range(100)):
    time.sleep(0.02)

does not update. I bisected to 572854d

it appears the issue is with the update_delta near line 569 of bar.py

[wolph]

Thank you so much for tracking it down. I guess that change still has some issues. I'll push out a new release tomorrow

…

On Feb 12, 2018 22:53, "JoeSc" ***@***.***> wrote: I have the same issue, simple example like import time import progressbar bar = progressbar.ProgressBar() for i in bar(range(100)): time.sleep(0.02) does not update. I bisected to 572854d <572854d> it appears the issue is with the update_delta near line 569 of bar.py — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#154 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAQg62g1ejyn4r0Znsv7mM1FIUwUoS4fks5tULK8gaJpZM4SCpI4> .

[wolph]

Thanks for the help everyone, I've released a new version which fixes the issue

[JoeSc]

It seems there's still issues, Using this example code results in the progressbar from jumping from 2% to 100%.

import time
import progressbar

bar = progressbar.ProgressBar()
for i in bar(range(1000)):
    time.sleep(0.001)

See behavior here in this terminal recording
https://asciinema.org/a/qNiqvZyx85lwQUGAJ6titcLWk

The recording shows me running simple.py at the current HEAD and then reverting both e664f04 and 572854d. After reverting it runs as expected with the progressbar progressing across the screen to 100%

[JoeSc]

I'm not quite sure how the underlying code works, but this change seems to fix the progressbar
https://gist.github.com/JoeSc/ef01c281318d99605ad4b49668f2b503

[wolph]

Thanks for the help guys, unfortunately this type of bug is hard to test for but I've put out a new release with the fixes similar to @JoeSc's changes :)