"RPy is a very simple, yet robust, Python interface to the R Programming Language. It can manage all kinds of R objects and can execute arbitrary R functions (including the graphic functions). All errors from the R language are converted to Python exceptions. Any module installed for the R system can be used from within Python."
I haven't used rpy, and perhaps you want a pure-python port for other reasons (e.g. performance, overhead), but rpy might give you what you want - immediately.
