We have moved to https://codeberg.org/KFmts/prb.py (the namespace has changed to KFmts, which groups packages related to parsing or serialization), grab new versions there.
Under the disguise of "better security" Micro$oft-owned GitHub has discriminated users of 1FA passwords while having commercial interest in success and wide adoption of FIDO 1FA specifications and Windows Hello implementation which it promotes as a replacement for passwords. It will result in dire consequencies and is competely inacceptable, read why.
If you don't want to participate in harming yourself, it is recommended to follow the lead and migrate somewhere away of GitHub and Micro$oft. Here is the list of alternatives and rationales to do it. If they delete the discussion, there are certain well-known places where you can get a copy of it. Read why you should also leave GitHub.
A parser for *.prb files, that are used by "Delphi for Fun" Logic Problem Solver by Gary Darby. The archives with the tool contain quite some pre-formalized examples, that may be used in future to test this library.
See ./tutorial.ipynb