You may try the Python bindings for the Boost Graph Library, the graph you talk about may fit in 2GB of a 32 bit OS too (this is the first link I have found, it's a lot of time I don't use those graph bindings): http://banyan.usc.edu/log/c_cpp/boost-graph-library-python-bindings
Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
