One of the most common uses for the various setup and teardown functions is to ensure certain class or module variables are available with a known value before each test method is run.
pytest offers a completely different way of doing this, using what are known as fixtures. Fixtures are basically named variables that are predefined in a test configuration file. This allows us to separate configuration from the execution of tests, and allows fixtures to be used across multiple classes and modules.
To use them, we add parameters to our test function. The names of the parameters are used to look up specific arguments in specially named functions. For example, if we wanted to test the StatsList
