Do you have any suggestions for Python libraries (other than what's mentioned in the post)?
PDF has been hit or miss, but pypdf has improved in the last couple of years. Depending on the document you'll sometimes get random spaces or nospacesatall.
I realize now staring at this, that I might have broken API a little. You can't do "text = paragraph.text" anymore, but you can do "text = ''.join([run.text for run in paragraph.runs])" instead.
If you're curious at all why it breaks, it's because in the OOXML spec paragraphs are made up of a ordered list of runs or hyperlinks (and hyperlinks can then contain additional runs). The master branch just implements paragraphs as ordered list of runs (and ignores all hyperlinks).
Replace the `qn("w:ins")` in the example with `qn("w:hyperlink")` and that should hopefully work?