Have you worked with any Python testing frameworks (e.g., unittest, pytest)? Can you explain how you write and execute unit tests?

Yes, I have experience with both unittest and pytest. To write unit tests, you create test cases as methods within a test class, using assertion methods to check the expected behavior of functions or methods. Then, you can run the tests using test runners like unittest's test runner or simply by running pytest in the terminal, which automatically discovers and runs test cases in the project directory.