Rateslib-excel provides the excel bindings for rateslib. This requires an external Excel COM Python bindings to be downloaded and installed separately. Currently, you can use either the pyxll add-in or the xloil add-in.
Anything possible in Python with rateslib, rateslib-excel aims to make possible in Excel.
Rateslib is the main Python library.
Rateslib-rs is the backend codebase
for parts of rateslib written in Rust using PyO3.