Fun thing about using pybind11 to emulate the functionality of an existing code base, but every single method needs to have its signature at least partly duplicated in six places:

• The C++ header
• The C++ implementation file
• The pybind declaration
• The *.pyi file
• The Python class that wraps the extension module to add docstrings and other conveniences
• The Python class that wraps everything and translates the old API into new API calls