Arelle is an open source XBRL processor/platform which was written in python by someone who has a lot of expertise with XBRL. Arelle supports XBRL 2.1, XBRL Dimensions, Inline XBRL, the Generic Linkbases specification, the unit types registry, XBRL Formula, U.S. SEC Edgar Filer Manual, IFRS Global Filing Manual, and HMRC Joint Filing Checks. Arelle runs on Windows and the Mac OS.
XBRL Spain, which is a major contributor to EuroFiling and OpenFiling, has created an Arelle User Guide.
Pyke is an approach to logic programming, inspired by PROLOG, that is written in Python.
pyDatalog is another approach to logic programming written in Python.