Floyd-Warshall Algorithem in Python

[Dave]

Hello, 

I'm looking for a Floyd-Warshall Python implementation. The only
implementation I  have seen (searching this newsgroup) used a Python
library called "Numeric". This   implementation doesn't work anymore.
I was wondering whether anyone knew of any FW implementations
elsewhere, or knew how I could convert the old example to Python code
that would run on Python 2.2?

Thanks,
Dave.