PySomorph is a python package for investingating subgraph isomorphism. Subgraph Isomorphism is useful for a number of pratical applications spanning from relational theory to investigating chemical structures. PySomorph is a binding to the University of Napoli's <http://amalfi.dis.unina.it/graph/> graph isomorphism library. The main benefit is that edges and nodes of graph structures can be arbitrary python objects. This allows for an amazing amount of flexibility in the creation and searching of various graphs. * Now uses disutils for unix/linux installations. * Fixed a reference counting bug that caused odd failures when certain objects were deleted. * added an example application, subgraph isomorphism for network topology Download and homepage at http://staffa.wi.mit.edu/people/kelley/ Brian Kelley Whitehead Institute for Biomedical Research