If a class has only one public method (other than its __init__) it should be replaced with a function.

Convert the single public method into a function. If there is an __init__ and it sets attributes on the self then rename the __init__ method and remove the self parameter Make the public method an inner function and return that.

Delete the class.

In this example the class only has a single method. This method does not need to be in its own class. It should be a method on its own that takes a and b as parameters.

Python: Classes.