progressbar2 4.5.0

Description:

progressbar2 4.5.0

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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 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
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.


Known issues

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: https://github.com/WoLpH/python-progressbar/issues/173



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

for i in progressbar.progressbar(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
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)


Multiple (threaded) progressbars
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()


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

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


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

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


Bar with wide Chinese (or other multibyte) characters
# 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)


Showing multiple independent progress bars in parallel
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()

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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