PyMuPDF VS PyPDF2

This method is based on the use of the libraries markdown-it-py (conversion from markdown to html) and [PyMuPDF] https://github.com/pymupdf/PyMuPDF) (conversion from html to pdf). A small Python class links them together.

I think you might mean PyMuPDF (https://github.com/pymupdf/PyMuPDF), a Python library built on top of the MuPDF C library (https://mupdf.com/).

PyMuPDF and MuPDF are both available under dual open source AGPL and commercial licenses. They have been around for many years and are under continual development.

[Disclaimer, i work for Artifex, who wrote MuPDF and recently acquired PyMuPDF.]

I still haven't needed to do that part in Rust yet, unfortunately. My mother is still using the pypdf-based concatenator I wrote for her years ago.

I did an extremely quick search and am linking this without knowing anything about it.

Pretty much study Python until this Github repo'd Readme makes sense!: https://github.com/py-pdf/PyPDF2

As other posters have said, if you're just generating PDFs, that's doable with minor library support. If you want to open existing PDFs and do anything non-trivial with them, you'll want a mature, powerful PDF parsing library. PDFKit, which is part of macOS is pretty amazing. If you need portability, something like Python's PyPDF2 is probably the best bet. Knowing the Rust community, though, we'll probably get a library at least as good in Rust in a surprisingly short amount of time.

Why are you using PyPDF4 which seems to have no active maintainer and no documentation instead of PyPDF2 which has both?

one of many options

Feel free. I poked around the PyPDF2 code and it seems like reading signatures is something it supports via xfa_form property (GitHub issue where this was discussed; seems to have been closed v. recently) . would probably be a very simple PR provided you knew where to look for that property.