Updates often beget updates. Yesterday I tweaked my Python parsing tools, which prompted Bruce Dickey and Sergej Zagursky to write in to say that ANTLR now generates Python parsers.

ANTLR is a mature parser generator. It is written in Java, but can generate parsers in Java, C++, C#, and now Python. Due to its long history, it has a large user base, which means a large collection of available grammars. ANTLR is a powerful and popular system, and its addition to the Python toolset is good news.