how to use key_type file: ?

[zh601095001]

For example, I want to load install_requires from file(requirement.txt) in setup.cfg? How I can do that?

├───dist
├───mypackage
├───mypackage.egg-info
├───test
├───requirements.txt --------------->use this file in setup.cfg?
├───setup.cfg
├───MANIFEST.in
├───README.md
└───pyproject.toml