Python parser for Python-like language

Question

I\'m looking to write a Python import filter or preprocessor for source files that are essentially Python with extra language elements. The goal is to read the source file, pars

Answer 1

The first thing that comes to mind is lib2to3. It is a complete pure-Python implementation of a Python parser. It reads a Python grammar file and parses Python source files according to this grammar. It offers a great infrastructure for performing AST manipulations and writing back nicely formatted Python code -- after all it's purpose is to transform between two Python-like languages with slightly different grammars.

Unfortunately it's lacking documentation and doesn't guarantee a stable interface. There are projects that build on top of lib2to3 nevertheless, and the source code is quite readable. If API stability is an issue, you can just fork it.