Python unit tests refer to the process of writing tests for small parts or units of your Python codebase, generally individual functions or methods. Unit testing helps identify issues at an early stage, reducing the time and effort needed for debugging later in the development cycle. It allows developers to catch bugs before the system becomes more complex, which is especially beneficial in larger projects. https://testomat.io/blog/a-guide-to-the-basics-of-python-testing-how-to-write-unit-tests-and-organize-execution-test-cases/