The following are links for different charting libraries:
matplotlib can be found at http://matplotlib.org
pygal can be found at http://pygal.org
Plotly can be found at https://plot.ly
PyChart can be found at http://home.gna.org/pychart/
iGraph: can be found at http://igraph.org/redirect.htmlNetworkX can be found at http://networkx.github.io
Graphviz can be found at http://www.graphviz.org/Gallery.php
pygooglechart (a Python wrapper for Google charts) can be found at https://github.com/gak/pygooglechart