Doctest testing your docstring by running example on your docstring. Doctest is already preinstalled in python so you don't need external depedencies. let's see this example create new file called ...

Dataframes powered by a multithreaded, vectorized query engine, written in Rust - chore (python): Replace blackdoc by ruff's new docstring formatter (#13182) · pola-rs/polars@180c760 ...