I'm sure that hartmut has done a presentation sometimes ago f, could be
http://www.matexhu.org/eurotex2006/lectures/pdftex/hartmut-talk.pdf


>
>
>  pypdf is a python module at lowlevel.
>> http://pybrary.net/pyPdf/
>>
>
> This looks very interesting!
>
>
>  As exercise, you can try to minimic pdffonts in python with pypdf
>> (pdfs with ttf,otf,type1 etc )
>>
>
> I'm afraid, I don't understand :-(
>
> Under linux, xpdf comes with pdffonts, a cmd line tools that extracts fonts
information from a pdf.
You can try to mimic it with pyPdf, so your knowledge  can augment .



-- 
luigi