Sometimes, you want to include in your package a file which is not a python script: an image, a text file... but preferably not a compiled binary that may not be executable once copied to a different system.
We add a file foo.txt in the src/calculator directory
and build again the wheel.
We can check that the new wheel file doens't contain the file newly created (the wheel file is a zip archive that your file explorer can certainly open). By default the build process extract only files that are needed.
We have to modify the pyproject.toml file to add this section:
[tool.setuptools.package-data]
calculator = ['foo.txt']
Build again the wheel and check its content.