Moving simple Fortran derived types to Python and back via C Background Object oriented programming has been part of Fortran for longer than I have been alive 1. Fortran has derived types now. They’ve been around for around for over three decades. The standards at the same time, have been supporting more and more interoperable operations. Details of these pleasant historical improvements are pretty much the most the Fortran standards committee have managed to date in the 21st century.
