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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

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 is based on the old Python progressbar package that was published on the now defunct Google Code. Since that project was completely abandoned by its developer and the developer did not respond to email, I decided to fork the package. This package is still backwards compatible with the original progressbar package so you can safely use it as a drop-in replacement for existing project.

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:

• AbsoluteETA
• AdaptiveETA
• AdaptiveTransferSpeed
• AnimatedMarker
• Bar
• BouncingBar
• Counter
• CurrentTime
• DataSize
• DynamicMessage
• ETA
• FileTransferSpeed
• FormatCustomText
• FormatLabel
• FormatLabelBar
• GranularBar
• Percentage
• PercentageLabelBar
• ReverseBar
• RotatingMarker
• SimpleProgress
• SmoothingETA
• Timer

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.

Wrapping a loop with progressbar2 is cheap -- and with the optional native accelerator it is the fastest progress bar available. On the benchmark machine (CPython 3.13, macOS arm64) the per-iteration overhead over a bare loop is:

Two tiers, same API:

• Pure Python (default): ~30 ns/iter -- roughly 1.8x faster than tqdm, second only to rich, with no native build required. An integer "next update" gate keeps the common iteration to an increment, a compare and a couple of cheap stores, only entering the (rate-limited) redraw machinery a few times per second. Behaviour is unchanged: same widgets, same redraw cadence, and value/previous_value stay byte-identical to the pre-gate implementation on every iteration.
• Native accelerator (pip install progressbar2[fast]): ~5 ns/iter, ~4x faster than rich. A small compiled (Cython) iterator counts in a C field and only calls back into Python at redraw crossings. It engages automatically when installed; the only behavioural difference is that bar.value is synced at redraw crossings rather than every iteration, so reads between redraws lag slightly (like tqdm.n). Set PROGRESSBAR_DISABLE_FASTPATH=1 to force the pure-Python path.

Importing progressbar is also light -- about 24 ms (net of interpreter startup), on par with tqdm/click and roughly half of rich. Nothing heavy is imported eagerly (no asyncio, for example).

The benchmark is fully reproducible and pits progressbar2 against tqdm, rich, alive-progress and click across iteration overhead, forced redraw cost, and import time -- all rendered to a real pseudo-terminal so the comparison is apples-to-apples:

python benchmarks/bench.py && python benchmarks/report.py

• The Jetbrains (PyCharm, etc) editors work out of the box, but for more advanced features such as the MultiBar support you will need to enable the "Enable terminal in output console" checkbox in the Run dialog.
• The IDLE editor doesn't support these types of progress bars at all: https://bugs.python.org/issue23220
• Jupyter notebooks buffer sys.stdout which can cause mixed output. This issue can be resolved easily using: import sys; sys.stdout.flush(). Linked issue: #173

• 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/

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.

import time
import progressbar

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

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

If you need to flush manually while wrapping, you can do so using:

import progressbar

progressbar.streams.flush()

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()

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

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()

import time
import progressbar

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

import time
import progressbar

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

import time
import progressbar

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

import time
import progressbar

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

# vim: fileencoding=utf-8
import time
import progressbar


def custom_len(value):
    # These characters take up more space
    characters = {
        '进': 2,
        '度': 2,
    }

    total = 0
    for c in value:
        total += characters.get(c, 1)

    return total


bar = progressbar.ProgressBar(
    widgets=[
        '进度: ',
        progressbar.Bar(),
        ' ',
        progressbar.Counter(format='%(value)02d/%(max_value)d'),
    ],
    len_func=custom_len,
)
for i in bar(range(10)):
    time.sleep(0.1)

import random
import sys
import time

import progressbar

BARS = 5
N = 100

# Construct the list of progress bars with the `line_offset` so they draw
# below each other
bars = []
for i in range(BARS):
    bars.append(
        progressbar.ProgressBar(
            max_value=N,
            # We add 1 to the line offset to account for the `print_fd`
            line_offset=i + 1,
            max_error=False,
        )
    )

# Create a file descriptor for regular printing as well
print_fd = progressbar.LineOffsetStreamWrapper(lines=0, stream=sys.stdout)

# The progress bar updates, normally you would do something useful here
for i in range(N * BARS):
    time.sleep(0.005)

    # Increment one of the progress bars at random
    bars[random.randrange(0, BARS)].increment()

    # Print a status message to the `print_fd` below the progress bars
    print(f'Hi, we are at update {i+1} of {N * BARS}', file=print_fd)

# Cleanup the bars
for bar in bars:
    bar.finish()

# Add a newline to make sure the next print starts on a new line
print()

Naturally we can do this from separate threads as well:

import random
import threading
import time

import progressbar

BARS = 5
N = 100

# Create the bars with the given line offset
bars = []
for line_offset in range(BARS):
    bars.append(progressbar.ProgressBar(line_offset=line_offset, max_value=N))


class Worker(threading.Thread):
    def __init__(self, bar):
        super().__init__()
        self.bar = bar

    def run(self):
        for i in range(N):
            time.sleep(random.random() / 25)
            self.bar.update(i)


for bar in bars:
    Worker(bar).start()

print()