Although often overlooked, testing is an essential step in the Software Development Life Cycle (SDLC). Python comes with its built-in testing framework called unittest. However, some developers find writing tests in unittest to be complicated. In recent years, pytest, a third-party testing framework, has gained popularity among developers for its ease of use and flexibility.

Pytest is a Python testing framework designed to assist developers with writing better systems and releasing them with confidence. It requires less boilerplate code, making test suites more readable and easy to maintain. A simple assert statement is used, rather than the assertSomething methods of unittest, making it easier to write and understand tests.