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A command-line tool that draws basic graphs in the terminal.

Project description


A command-line tool that draws basic graphs in the terminal, written in Python.

Graph types supported:

  • Bar Graphs
  • Color charts
  • Multi-variable
  • Stacked charts
  • Histograms
  • Horizontal or Vertical
  • Emoji!


termgraph data/ex1.dat

# Reading data from data/ex1.dat

2007: ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 183.32
2008: ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 231.23
2009: ▇ 16.43
2010: ▇▇▇▇ 50.21
2011: ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 508.97
2012: ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 212.05
2014: ▏ 1.00

An example using emoji as custom tick:

termgraph data/ex1.dat --custom-tick "🏃" --width 20 --title "Running Data"

# Running Data

2007: 🏃🏃🏃🏃🏃🏃🏃 183.32
2008: 🏃🏃🏃🏃🏃🏃🏃🏃🏃 231.23
2009:  16.43
2010: 🏃 50.21
2011: 🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃🏃 508.97
2012: 🏃🏃🏃🏃🏃🏃🏃🏃 212.05
2014:  1.00

An example using stdin and emoji:

echo "Label,3,9,1" | termgraph --custom-tick "😀" --no-label

😀😀😀 3.00
😀😀😀😀😀😀😀😀😀 9.00
😀 1.00

Most results can be copied and pasted wherever you like, since they use standard block characters. However the color charts will not show, since they use terminal escape codes for color. A couple images to show color examples:

termgraph data/ex4.dat --color {blue,red}
Multi variable bar chart with colors
termgraph data/ex7.dat --color {yellow,magenta} --stacked --title "Stacked Data"
Multi variable stacked bar chart with colors

Calendar Heatmap, expects first column to be date in yyyy-mm-dd

termgraph --calendar --start-dt 2017-07-01 data/cal.dat
Calendar Heatmap


Requires Python 3.7+, install from PyPI project

python3 -m pip install termgraph

Note: Be sure your PATH includes the pypi install directory, for me it is ~/.local/bin/


  • Create data file with two columns either comma or space separated. The first column is your labels, the second column is a numeric data

  • termgraph [datafile]

  • Help: termgraph -h

usage: [-h] [(optional arguments)] [filename]

draw basic graphs on terminal

positional arguments:
  filename              data file name (comma or space separated). Defaults to stdin.

optional arguments:
  -h, --help            show this help message and exit
  --title TITLE         Title of graph
  --width WIDTH         width of graph in characters default:50
  --format FORMAT       format specifier to use.
  --suffix SUFFIX       string to add as a suffix to all data points.
  --no-labels           Do not print the label column
  --no-values           Do not print the values at end
  --space-between       Print a new line after every field
  --color [COLOR ...]   Graph bar color( s )
  --vertical            Vertical graph
  --stacked             Stacked bar graph
  --histogram           Histogram
  --bins BINS           Bins of Histogram
  --different-scale     Categories have different scales.
  --calendar            Calendar Heatmap chart
  --start-dt START_DT   Start date for Calendar chart
  --custom-tick CUSTOM_TICK
                        Custom tick mark, emoji approved
  --delim DELIM         Custom delimiter, default , or space
  --verbose             Verbose output, helpful for debugging
  --label-before        Display the values before the bars
  --version             Display version and exit


I wanted a quick way to visualize data stored in a simple text file. I initially created some scripts in R that generated graphs but this was a two step process of creating the graph and then opening the generated graph.

After seeing command-line sparklines I figured I could do the same thing using block characters for bar charts.


All contributions are welcome, for feature requests or bug reports, use Github Issues. Pull requests are welcome to help fix or add features.

Code contributions: This repository uses the black code formatter to automatically format the code. A Github Action is setup to lint your code, to avoid failures it is recommended to setup your editor to auto format on save.

Thanks to all the contributors!


MIT License, see LICENSE.txt

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