Message 191971 - Python tracker

https://pypi.python.org/pypi/cykeccak/ is what I've written to do this, for reference. 

Honestly I hope that the Keccak sponge is directly exposed in openssl (or any other SHA-3 implementation) because of its utility beyond SHA-3. If the source of some other implementation is going to be bundled with python anyway, it shouldn't be difficult to expose the sponge bits.