This is a simple Python script to generate pictures of a feed-forward neural network using Python and Graphviz. This is heavily inspired by Thiago G. Martins How to draw neural network diagrams using Graphviz.
Pipe to Preview in Mac OS X.
python dotnets.py | dot -Tpng | open -f -a /Applications/Preview.app
Or generate a PDF
python dotnets.py | dot -Tpdf > test.pdf