Typesetting of code is implied by the file extension

• .py: pypro if complete file, pycod if snippet
• .pyopt: visualized execution via the Online Python Tutor
• .f, .f90, f.95: fpro and fcod
• .cpp, .cxx: cpppro and cppcod
• .c: cpro and ccod
• .*sh: shpro and shcod
• .m: mpro and mcod
• ptex2tex: between 40+ code styles in LaTeX
• pygments is used for code in HTML (ca 10 styles)