xflr6 / graphviz

Simple Python interface for Graphviz

https://graphviz.readthedocs.io

MIT License

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Graphviz

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This package facilitates the creation and rendering of graph descriptions in the DOT language of the Graphviz graph drawing software (upstream repo_) from Python.

Create a graph object, assemble the graph by adding nodes and edges, and retrieve its DOT source code string. Save the source code to a file and render it with the Graphviz installation of your system.

Use the view option/method to directly inspect the resulting (PDF, PNG, SVG, etc.) file with its default application. Graphs can also be rendered and displayed within Jupyter notebooks (formerly known as IPython notebooks, example <notebook_>, `nbviewer <notebook-nbviewer>_) as well as theJupyter QtConsole`_.

Links

GitHub: https://github.com/xflr6/graphviz
PyPI: https://pypi.org/project/graphviz/
Documentation: https://graphviz.readthedocs.io
Changelog: https://graphviz.readthedocs.io/en/latest/changelog.html
Issue Tracker: https://github.com/xflr6/graphviz/issues
Download: https://pypi.org/project/graphviz/#files
Development documentation: https://graphviz.readthedocs.io/en/latest/development.html
Release process: https://graphviz.readthedocs.io/en/latest/release_process.html

Installation

This package runs under Python 3.8+, use pip_ to install:

.. code:: bash

$ pip install graphviz

To render the generated DOT source code, you also need to install Graphviz (`download page <upstream-download>_, archived versions _, installation procedure for Windows `_).

Make sure that the directory containing the dot executable is on your systems' PATH (sometimes done by the installer; setting PATH on Linux <set-path-linux_>, `Mac <set-path-darwin>_, andWindows `_).

Anaconda: see the conda-forge package conda-forge/python-graphviz <conda-forge-python-graphviz_> (`feedstock <conda-forge-python-graphviz-feedstock>_), which should automatically ``conda install`` conda-forge/graphviz _ (feedstock `_) as dependency.

Quickstart

Create a graph object:

.. code:: python

>>> import graphviz  # doctest: +NO_EXE
>>> dot = graphviz.Digraph(comment='The Round Table')
>>> dot  #doctest: +ELLIPSIS
<graphviz.graphs.Digraph object at 0x...>

Add nodes and edges:

.. code:: python

>>> dot.node('A', 'King Arthur')  # doctest: +NO_EXE
>>> dot.node('B', 'Sir Bedevere the Wise')
>>> dot.node('L', 'Sir Lancelot the Brave')

>>> dot.edges(['AB', 'AL'])
>>> dot.edge('B', 'L', constraint='false')

Check the generated source code:

.. code:: python

>>> print(dot.source)  # doctest: +NORMALIZE_WHITESPACE +NO_EXE
// The Round Table
digraph {
    A [label="King Arthur"]
    B [label="Sir Bedevere the Wise"]
    L [label="Sir Lancelot the Brave"]
    A -> B
    A -> L
    B -> L [constraint=false]
}

Save and render the source code (skip/ignore any doctest_mark_exe() lines):

.. code:: python

>>> doctest_mark_exe()  # skip this line

>>> dot.render('doctest-output/round-table.gv').replace('\\', '/')
'doctest-output/round-table.gv.pdf'

Save and render and view the result:

.. code:: python

>>> doctest_mark_exe()  # skip this line

>>> dot.render('doctest-output/round-table.gv', view=True)  # doctest: +SKIP
'doctest-output/round-table.gv.pdf'

.. image:: https://raw.github.com/xflr6/graphviz/master/docs/_static/round-table.svg :align: center :alt: round-table.svg

Caveat: Backslash-escapes and strings of the form <...> have a special meaning in the DOT language. If you need to render arbitrary strings (e.g. from user input), check the details in the user guide_.

See also

pygraphviz_ |--| full-blown interface wrapping the Graphviz C library with SWIG
graphviz-python |--| official Python bindings (`documentation <graphviz-python-docs>`_)
pydot_ |--| stable pure-Python approach, requires pyparsing

License

This package is distributed under the MIT license_.

.. _Graphviz: https://www.graphviz.org .. _DOT: https://www.graphviz.org/doc/info/lang.html .. _upstream repo: https://gitlab.com/graphviz/graphviz/ .. _upstream-download: https://www.graphviz.org/download/ .. _upstream-archived: https://www2.graphviz.org/Archive/stable/ .. _upstream-windows: https://forum.graphviz.org/t/new-simplified-installation-procedure-on-windows/224

.. _set-path-windows: https://www.computerhope.com/issues/ch000549.htm .. _set-path-linux: https://stackoverflow.com/questions/14637979/how-to-permanently-set-path-on-linux-unix .. _set-path-darwin: https://stackoverflow.com/questions/22465332/setting-path-environment-variable-in-osx-permanently

.. _pip: https://pip.pypa.io

.. _Jupyter notebooks: https://jupyter.org .. _IPython notebooks: https://ipython.org/notebook.html .. _Jupyter QtConsole: https://qtconsole.readthedocs.io

.. _notebook: https://github.com/xflr6/graphviz/blob/master/examples/graphviz-notebook.ipynb .. _notebook-nbviewer: https://nbviewer.org/github/xflr6/graphviz/blob/master/examples/graphviz-notebook.ipynb

.. _Anaconda: https://docs.anaconda.com/anaconda/install/ .. _conda-forge: https://conda-forge.org .. _conda-forge-python-graphviz: https://anaconda.org/conda-forge/python-graphviz .. _conda-forge-python-graphviz-feedstock: https://github.com/conda-forge/python-graphviz-feedstock .. _conda-forge-graphviz: https://anaconda.org/conda-forge/graphviz .. _conda-forge-graphviz-feedstock: https://github.com/conda-forge/graphviz-feedstock

.. _user guide: https://graphviz.readthedocs.io/en/stable/manual.html

.. _pygraphviz: https://pypi.org/project/pygraphviz/ .. _graphviz-python: https://pypi.org/project/graphviz-python/ .. _graphviz-python-docs: https://www.graphviz.org/pdf/gv.3python.pdf .. _pydot: https://pypi.org/project/pydot/

.. _MIT license: https://opensource.org/licenses/MIT

.. |--| unicode:: U+2013

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