I've been working with openmodelica for awhile and always have found it difficult to extend the compiler for my needs. Recently ANTLR released a python runtime. I was able to easily combine the AST created with antlr and the jinja templates engine to create a compiler from modelica to a python based simulation for simple examples. I'm looking for anyone with interest in helping me out.

https://github.com/jgoppert/pymola

Jinja template to render AST into python simulation:
https://github.com/jgoppert/pymola/blob … ympy.jinja


ANTLR 4 Modelica Grammar:
https://github.com/jgoppert/pymola/blob … odelica.g4