Have you looked at the AST python module?

On 3 May 2013 21:35, Angus Griffith <16sn...@gmail.com> wrote:
> Inspiration: in Mathematica there's SymbolicC that just represents language
> constructs (without applying semantics yet).
>
> The symbolic representation acts as follows:
>
> external execution <- other language <-> symbolic representation <-> sympy
> translation -> sympy execution
>
> The symbolic representation is a Sympy object that represents some language
> expression of python, Mathematica, Sympy, LaTeX etc.
>
> Each representation would be equipped with two important methods, one for
> translation to Sympy and one for translation to it's own language.
>
> For example the python expression '1 + 2' would be parsed to a symbolic
> expression of python_add(python_int(1), python_int(2)). Calling .to_sympy()
> on this object would generate the Sympy expression Add(S(1), S(2)) which
> then evaluates to S(3). The important thing is that it works in the other
> direction too!
>
> Credit for this idea goes to @poescko.
>
> (We came up this idea only slightly too late for my GSOC proposal).
>
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