pydot:

• is an interface to Graphviz
• can parse and dump into the DOT language used by GraphViz,
• is written in pure Python,

and networkx can convert its graphs to pydot.

From PyPI using pip:

pip install pydot

From source:

python setup.py install

• pyparsing: used only for loading DOT files, installed automatically during pydot installation.

• GraphViz: used to render graphs as PDF, PNG, SVG, etc. Should be installed separately, using your system's package manager, something similar (e.g., MacPorts), or from its source.

Distributed under an MIT license.