Enlighten Progress Bar
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Enlighten Progress Bar is a console progress bar library for Python.
The main advantage of Enlighten is it allows writing to stdout and stderr without any redirection or additional code. Just print or log as you normally would.
Enlighten also includes experimental support for Jupyter Notebooks.
|
.. image:: https://raw.githubusercontent.com/Rockhopper-Technologies/enlighten/master/doc/_static/demo.gif :target: http://python-enlighten.readthedocs.io/en/stable/examples.html
The code for this animation can be found in
demo.py <https://github.com/Rockhopper-Technologies/enlighten/blob/master/examples/demo.py>
__
in
examples <https://github.com/Rockhopper-Technologies/enlighten/tree/master/examples>
__.
https://python-enlighten.readthedocs.io
.. code-block:: console
$ pip install enlighten
Fedora and EL8 (RHEL/CentOS) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(For EPEL_ repositories must be configured_)
.. code-block:: console
$ dnf install python3-enlighten
Debian and Ubuntu ^^^^^^^^^^^^^^^^^ .. code-block:: console
$ apt-get install python3-enlighten
.. code-block:: console
$ conda install -c conda-forge enlighten
.. _EPEL: https://fedoraproject.org/wiki/EPEL .. _configured: https://fedoraproject.org/wiki/EPEL#How_can_I_use_these_extra_packages.3F
The first step is to create a manager. Managers handle output to the terminal and allow multiple progress bars to be displayed at the same time.
get_manager_ can be used to get a Manager_ instance.
Managers will only display output when the output stream, sys.__stdout__
by default,
is attached to a TTY. If the stream is not attached to a TTY, the manager instance returned will be
disabled.
In most cases, a manager can be created like this.
.. code-block:: python
import enlighten
manager = enlighten.get_manager()
If you need to use a different output stream, or override the defaults, see the documentation for get_manager_
For a basic progress bar, invoke the Manager.counter_ method.
.. code-block:: python
import time
import enlighten
manager = enlighten.get_manager()
pbar = manager.counter(total=100, desc='Basic', unit='ticks')
for num in range(100):
time.sleep(0.1) # Simulate work
pbar.update()
Additional progress bars can be created with additional calls to the Manager.counter_ method.
.. code-block:: python
import time
import enlighten
manager = enlighten.get_manager()
ticks = manager.counter(total=100, desc='Ticks', unit='ticks')
tocks = manager.counter(total=20, desc='Tocks', unit='tocks')
for num in range(100):
time.sleep(0.1) # Simulate work
print(num)
ticks.update()
if not num % 5:
tocks.update()
manager.stop()
The Counter_ class has two output formats, progress bar and counter.
The progress bar format is used when a total is not None
and the count is less than the
total. If neither of these conditions are met, the counter format is used:
.. code-block:: python
import time
import enlighten
manager = enlighten.get_manager()
counter = manager.counter(desc='Basic', unit='ticks')
for num in range(100):
time.sleep(0.1) # Simulate work
counter.update()
Status bars are bars that work similarly to progress bars and counters, but present relatively static information. Status bars are created with Manager.status_bar_.
.. code-block:: python
import enlighten
import time
manager = enlighten.get_manager()
status_bar = manager.status_bar('Static Message',
color='white_on_red',
justify=enlighten.Justify.CENTER)
time.sleep(1)
status_bar.update('Updated static message')
time.sleep(1)
Status bars can also use formatting with dynamic variables.
.. code-block:: python
import enlighten
import time
manager = enlighten.get_manager()
status_format = '{program}{fill}Stage: {stage}{fill} Status {status}'
status_bar = manager.status_bar(status_format=status_format,
color='bold_slategray',
program='Demo',
stage='Loading',
status='OKAY')
time.sleep(1)
status_bar.update(stage='Initializing', status='OKAY')
time.sleep(1)
status_bar.update(status='FAIL')
Status bars, like other bars can be pinned. To pin a status bar to the top of all other bars,
initialize it before any other bars. To pin a bar to the bottom of the screen, use
position=1
when initializing.
See StatusBar_ for more details.
Status bars and the bar component of a progress bar can be colored by setting the
color
keyword argument. See
Series Color <https://python-enlighten.readthedocs.io/en/stable/api.html#series-color>
_ for more
information about valid colors.
.. code-block:: python
import time
import enlighten
manager = enlighten.get_manager()
counter = manager.counter(total=100, desc='Colorized', unit='ticks', color='red')
for num in range(100):
time.sleep(0.1) # Simulate work
counter.update()
Additionally, any part of the progress bar can be colored using counter formatting <https://python-enlighten.readthedocs.io/en/stable/api.html#counter-format>
_ and the
color capabilities <https://blessed.readthedocs.io/en/stable/colors.html>
_
of the underlying Blessed <https://blessed.readthedocs.io/en/stable>
_
Terminal <https://blessed.readthedocs.io/en/stable/terminal.html>
_.
.. code-block:: python
import enlighten
manager = enlighten.get_manager()
# Standard bar format
std_bar_format = u'{desc}{desc_pad}{percentage:3.0f}%|{bar}| ' + \
u'{count:{len_total}d}/{total:d} ' + \
u'[{elapsed}<{eta}, {rate:.2f}{unit_pad}{unit}/s]'
# Red text
bar_format = manager.term.red(std_bar_format)
# Red on white background
bar_format = manager.term.red_on_white(std_bar_format)
# X11 colors
bar_format = manager.term.peru_on_seagreen(std_bar_format)
# RBG text
bar_format = manager.term.color_rgb(2, 5, 128)(std_bar_format)
# RBG background
bar_format = manager.term.on_color_rgb(255, 190, 195)(std_bar_format)
# RGB text and background
bar_format = manager.term.on_color_rgb(255, 190, 195)(std_bar_format)
bar_format = manager.term.color_rgb(2, 5, 128)(bar_format)
# Apply color to select parts
bar_format = manager.term.red(u'{desc}') + u'{desc_pad}' + \
manager.term.blue(u'{percentage:3.0f}%') + u'|{bar}|'
# Apply to counter
ticks = manager.counter(total=100, desc='Ticks', unit='ticks', bar_format=bar_format)
If the color
option is applied to a Counter_,
it will override any foreground color applied.
The bar component of a progress bar can be multicolored to track multiple categories in a single progress bar.
The colors are drawn from right to left in the order they were added.
By default, when multicolored progress bars are used, additional fields are available for
bar_format
:
- count_n (``int``) - Current value of ``count``
- count_0(``int``) - Remaining count after deducting counts for all subcounters
- count_00 (``int``) - Sum of counts from all subcounters
- percentage_n (``float``) - Percentage complete
- percentage_0(``float``) - Remaining percentage after deducting percentages
for all subcounters
- percentage_00 (``float``) - Total of percentages from all subcounters
When Counter.add_subcounter_ is called with all_fields
set to True
,
the subcounter will have the additional fields:
- eta_n (``str``) - Estimated time to completion
- rate_n (``float``) - Average increments per second since parent was created
More information about bar_format
can be found in the Format_ section of the API.
One use case for multicolored progress bars is recording the status of a series of tests. In this example, Failures are red, errors are white, and successes are green. The count of each is listed in the progress bar.
.. code-block:: python
import random
import time
import enlighten
bar_format = u'{desc}{desc_pad}{percentage:3.0f}%|{bar}| ' + \
u'S:{count_0:{len_total}d} ' + \
u'F:{count_2:{len_total}d} ' + \
u'E:{count_1:{len_total}d} ' + \
u'[{elapsed}<{eta}, {rate:.2f}{unit_pad}{unit}/s]'
manager = enlighten.get_manager()
success = manager.counter(total=100, desc='Testing', unit='tests',
color='green', bar_format=bar_format)
errors = success.add_subcounter('white')
failures = success.add_subcounter('red')
while success.count < 100:
time.sleep(random.uniform(0.1, 0.3)) # Random processing time
result = random.randint(0, 10)
if result == 7:
errors.update()
if result in (5, 6):
failures.update()
else:
success.update()
A more complicated example is recording process start-up. In this case, all items will start red, transition to yellow, and eventually all will be green. The count, percentage, rate, and eta fields are all derived from the second subcounter added.
.. code-block:: python
import random
import time
import enlighten
services = 100
bar_format = u'{desc}{desc_pad}{percentage_2:3.0f}%|{bar}|' + \
u' {count_2:{len_total}d}/{total:d} ' + \
u'[{elapsed}<{eta_2}, {rate_2:.2f}{unit_pad}{unit}/s]'
manager = enlighten.get_manager()
initializing = manager.counter(total=services, desc='Starting', unit='services',
color='red', bar_format=bar_format)
starting = initializing.add_subcounter('yellow')
started = initializing.add_subcounter('green', all_fields=True)
while started.count < services:
remaining = services - initializing.count
if remaining:
num = random.randint(0, min(4, remaining))
initializing.update(num)
ready = initializing.count - initializing.subcount
if ready:
num = random.randint(0, min(3, ready))
starting.update_from(initializing, num)
if starting.count:
num = random.randint(0, min(2, starting.count))
started.update_from(starting, num)
time.sleep(random.uniform(0.1, 0.5)) # Random processing time
basic <https://raw.githubusercontent.com/Rockhopper-Technologies/enlighten/master/examples/basic.py>
__ - Basic progress barcontext manager <https://raw.githubusercontent.com/Rockhopper-Technologies/enlighten/master/examples/context_manager.py>
__ - Managers and counters as context managersfloats <https://raw.githubusercontent.com/Rockhopper-Technologies/enlighten/master/examples/floats.py>
__ - Support totals and counts that are floats
multicolored <https://raw.githubusercontent.com/Rockhopper-Technologies/enlighten/master/examples/multicolored.py>
__ - Multicolored progress barsmultiple with logging <https://raw.githubusercontent.com/Rockhopper-Technologies/enlighten/master/examples/multiple_logging.py>
__ - Nested progress bars and loggingFTP downloader <https://raw.githubusercontent.com/Rockhopper-Technologies/enlighten/master/examples/ftp_downloader.py>
__ - Show progress downloading files from FTPEnlighten is highly configurable. For information on modifying the output, see the Series_ and Format_ sections of the Counter_ documentation.
.. _Counter: http://python-enlighten.readthedocs.io/en/stable/api.html#enlighten.Counter .. _Counter.add_subcounter: https://python-enlighten.readthedocs.io/en/stable/api.html#enlighten.Counter.add_subcounter .. _StatusBar: https://python-enlighten.readthedocs.io/en/stable/api.html#enlighten.StatusBar .. _Manager: http://python-enlighten.readthedocs.io/en/stable/api.html#enlighten.Manager .. _Manager.counter: https://python-enlighten.readthedocs.io/en/stable/api.html#enlighten.Manager.counter .. _Manager.status_bar: https://python-enlighten.readthedocs.io/en/stable/api.html#enlighten.Manager.status_bar .. _get_manager: http://python-enlighten.readthedocs.io/en/stable/api.html#enlighten.get_manager .. _Format: http://python-enlighten.readthedocs.io/en/stable/api.html#counter-format .. _Series: http://python-enlighten.readthedocs.io/en/stable/api.html#series .. _EPEL: https://fedoraproject.org/wiki/EPEL .. _configured: https://fedoraproject.org/wiki/EPEL#How_can_I_use_these_extra_packages.3F