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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 the Jupyter QtConsole.
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 <upstream-archived_>,
installation procedure for Windows <upstream-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_>,
and Windows <set-path-windows_>_).
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 <conda-forge-graphviz_>
(feedstock <conda-forge-graphviz-feedstock_>_) as dependency.
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_.
documentation <graphviz-python-docs_>_)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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FAQs
Simple Python interface for Graphviz
We found that graphviz demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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