What is the use of the "unittest" module in Python?

The **unittest** module is a built-in testing framework in Python that provides a way to test your code. It is often used for writing unit tests for individual components of a software application to verify that they work as expected. The **unittest** module provides a number of testing tools and features, such as test discovery, test fixtures, test cases, test suites, test runners, and more. With these tools, you can create automated tests that can be run repeatedly, ensuring that your code remains correct and reliable over time.

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