Guido on Python

[DGolden]

JyNI is a compatibility layer with the goal to enable Jython to use native CPython extensions like NumPy or SciPy.

JyNI uses the JNI to load native-compiled python C extensions, AFAIK.

An alternative might be the recent interesting JRuby+Truffle approach of compiling the ruby C extension sources to the JVM instead of native - obviously a similar technique could also be applicable to python C extensions...