Python library to generate sparklines ▁▂▄▅▇█ in your shell based upon relative ordering of data. lehar is a Hindi word which means wave. lehar can be invoked via commandline also.

# Find commits by authors in a git repo
$ git shortlog -s | cut -f1 | lehar
▇▁▁▁▁▁▁▂▃▁▁█▁▁▂▃▅▁▁▁▂▆▁▁▁▂▁▁▁▁▂▇▁▅▆▁▁▁▄▁▁█▁▁▂▁▂▁

Some cool usage

Each data point in the data set is plotted relative to the maximum data point value with the maximum having the highest plot height. And they are only 5 possible heights so two number with very less fraction difference relative to max data point can take same plot height. Its a way of visualizing variations in data.

Using pip

$ pip install lehar

type : list

Only supported option is color eg. color='red'

>>> import lehar

# Strings
>>> lehar.draw(["0","1","2","3","4"])
'▁▂▄▆█'

# Numbers
>>> lehar.draw([0,1,2,3,4])
'▁▂▄▆█'

# Negatives
>>> lehar.draw([1,3,-34,12,44,81,0])
'▃▃▁▄▆█▃'

# Missing data
>>> lehar.draw([1,3,-34,'',12,44,'',81,0])
'▃▃▁ ▄▆ █▃'

>>> lehar.draw(["0","1","2","3","4"],color="yellow")

>>> lehar.draw([1,3,-34,'',12,44,'',81,0],color="cyan")

$ lehar 1 2 3 4 5

$ lehar -c red 1 2 3 4 5

$ echo "-c cyan 1 2 3 4 5" | lehar

$ lehar < input

lehar supports both Python2 & Python3.

• Setup

$ git clone https://github.com/darxtrix/lehar
$ cd lehar 
$ pip install -r requirements.txt
$ python setup.py develop
$ lehar 

• Tests are located at lehar/tests.py and covergae tests are located at .travis.yml

$ python tests.py

• While sending a pull request increment the version at VERSION and make sure the travis build passes.

Please file as issue here for suggesting the improvements required.

MIT © Ankush Sharma