Programmatically converting/parsing LaTeX code to plain text

Question

I have a couple of code projects in C++/Python in which LaTeX-format descriptions and labels are used to generate PDF documentation or graphs made using LaTeX+pstricks. However,

Answer 1

LaTeX-format descriptions and labels are used to generate PDF documentation or graphs made using LaTeX+pstricks

This is your mistake. You shouldn't have done that.

Use RST or some other -- better -- markup language.

Use Docutils to create LaTeX and HTML from the RST source.