Efficient Context-Free Grammar parser, preferably Python-friendly

Question

I am in need of parsing a small subset of English for one of my project, described as a context-free grammar with (1-level) feature structures (example) and I need to do it

Answer 1

I think ANTLR is the best parser-generator that I know of for Java. I don't know if Jython would provide you a good way for Python and Java to interact.