Doctest
Doctest is a lightweight testing framework for Python that allows developers to embed test cases directly within docstrings of functions, classes, or modules. It extracts and executes these examples to verify that the code behaves as documented, making it ideal for ensuring documentation accuracy and basic functionality. By integrating tests with documentation, it promotes code clarity and simplifies maintenance.
Developers should use Doctest when they need a simple, low-overhead way to test Python code, especially for small projects, libraries, or educational materials where documentation and examples are crucial. It is particularly useful for verifying that examples in docstrings are correct, catching regressions early, and encouraging good documentation practices without the complexity of larger testing frameworks like pytest.