Pydot

The page of pydot, a Python interface to Graphviz's Dot language.

# import pydot
# edges=[(1,2), (1,3), (1,4), (3,4)]
# g=pydot.graph_from_edges(edges)
g.write_jpeg('graph_from_edges_neato.jpg', prog='neato')

Check out the resulting image.