See http://slott56.github.io/PyLit-3/index.html for the complete documentation.
The Makefile is used via make html to rebuild the code and documentation.
The docs directory contains the documentation, plus many examples.
The pylit.py is the module. Once you've installed it, use python -m pylit to run it.
The test directory contains the unit test suite.
The contribs directory are old contributed modules which have not yet been converted to Python3.
The code repository is: https://github.com/slott56/PyLit-3