There is a JavaScript parser at least in C and Java (Mozilla), in JavaScript (Mozilla again) and Ruby. Is there any currently out there for Python?
I don't need a JavaScript interpreter, per se, just a parser that's up to ECMA-262 standards.
A quick google search revealed no immediate answers, so I'm asking the SO community.
Maybe PyWebkitGtk? There's also PyXPCOM for Gecko. Haven't used either myself.
ANTLR, ANother Tool for Language Recognition, is a language tool that provides a framework for constructing recognizers, interpreters, compilers, and translators from grammatical descriptions containing actions in a variety of target languages.
The ANTLR site provides many grammars , including one for JavaScript.
As it happens, there is a Python API available - so you can call the lexer (recognizer) generated from the grammar directly from Python (good luck).
You can try python-spidermonkey It is a wrapper over spidermonkey which is codename for Mozilla's C implementation of javascript.
http://code.google.com/p/pynarcissus/ seems to have a parser. I'm not sure what state it is in, but it looks to be complete.