This is a parser for Probabilistic Linear Context-Free Rewriting Systems (PLCFRS). It only produces the Viterbi parse. The grammar is supplied in a file following a simple text format. The plcfrs.py script can be translated to C++ by the Shed Skin compiler, after which the resulting code can be compiled with make:

sudo apt-get install shedskin
cd disco-dop/shedskin
shedskin -b -l -w plcfrs.py
make