Preston-Landers / python-progressbar

Progressbar 2 - A progress bar for Python 2 and Python 3 - "pip install progressbar2"

Text progress bar library for Python.

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Install

The package can be installed through pip (this is the recommended method):

pip install progressbar2

Or if pip is not available, easy_install should work as well:

easy_install progressbar2

Or download the latest release from Pypi (https://pypi.python.org/pypi/progressbar2) or Github.

Note that the releases on Pypi are signed with my GPG key (https://pgp.mit.edu/pks/lookup?op=vindex&search=0xE81444E9CE1F695D) and can be checked using GPG:

gpg --verify progressbar2-<version>.tar.gz.asc progressbar2-<version>.tar.gz

Introduction

A text progress bar is typically used to display the progress of a long running operation, providing a visual cue that processing is underway.

The ProgressBar class manages the current progress, and the format of the line is given by a number of widgets. A widget is an object that may display differently depending on the state of the progress bar. There are many types of widgets:

• Timer
• ETA
• AdaptiveETA
• FileTransferSpeed
• AdaptiveTransferSpeed
• AnimatedMarker
• Counter
• Percentage
• FormatLabel
• SimpleProgress
• Bar
• ReverseBar
• BouncingBar
• RotatingMarker
• DynamicMessage

The progressbar module is very easy to use, yet very powerful. It will also automatically enable features like auto-resizing when the system supports it.

Known issues

Due to limitations in both the IDLE shell and the Jetbrains (Pycharm) shells this progressbar cannot function properly within those.

• The IDLE editor doesn't support these types of progress bars at all: https://bugs.python.org/issue23220
• The Jetbrains (Pycharm) editors partially work but break with fast output. As a workaround make sure you only write to either sys.stdout (regular print) or sys.stderr at the same time. If you do plan to use both, make sure you wait about ~200 milliseconds for the next output or it will break regularly. Linked issue: wolph#115

Links

• Documentation

  • https://progressbar-2.readthedocs.org/en/latest/

• Source

  • https://github.com/WoLpH/python-progressbar

• Bug reports

  • https://github.com/WoLpH/python-progressbar/issues

• Package homepage

  • https://pypi.python.org/pypi/progressbar2

• My blog

  • https://w.wol.ph/

Usage

There are many ways to use Python Progressbar, you can see a few basic examples here but there are many more in the examples file.

Wrapping an iterable

import time
import progressbar

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

Progressbars with logging

Progressbars with logging require stderr redirection _before_ the StreamHandler is initialized. To make sure the stderr stream has been redirected on time make sure to call progressbar.streams.wrap_stderr() before you initialize the logger.

One option to force early initialization is by using the WRAP_STDERR environment variable, on Linux/Unix systems this can be done through:

# WRAP_STDERR=true python your_script.py

In most cases the following will work as well, as long as you initialize the StreamHandler after the wrapping has taken place.

import time
import logging
import progressbar

progressbar.streams.wrap_stderr()
logging.basicConfig()

bar = progressbar.ProgressBar()
for i in bar(range(10)):
    logging.error('Got %d', i)
    time.sleep(0.2)

Context wrapper

import time
import progressbar

with progressbar.ProgressBar(max_value=10) as bar:
    for i in range(10):
        time.sleep(0.1)
        bar.update(i)

Combining progressbars with print output

import time
import progressbar

bar = progressbar.ProgressBar(redirect_stdout=True)
for i in range(100):
    print 'Some text', i
    time.sleep(0.1)
    bar.update(i)

Progressbar with unknown length

import time
import progressbar

bar = progressbar.ProgressBar(max_value=progressbar.UnknownLength)
for i in range(20):
    time.sleep(0.1)
    bar.update(i)

Bar with custom widgets

import time
import progressbar

bar = progressbar.ProgressBar(widgets=[
    ' [', progressbar.Timer(), '] ',
    progressbar.Bar(),
    ' (', progressbar.ETA(), ') ',
])
for i in bar(range(20)):
    time.sleep(0.1)