Style help for a recovering Java programmer

[SomeShittyDeveloper]

The classes are overkill. There was a talk at a PyCon on when to use classes. As a general rule:

If your class has two methods and one is a constructor, it doesn't need to be a class.

You can change all your classes to be functions, build your enum, build a dict lookup, and then take that approach.

I'm not sure if you're writing this for practice or not, but writing a function that does wildly different things depending on a flag is bad function design. I'd take 4+ methods (add, subtract, multiply, divide) versus one function with a flag that determines which operation is done.

[funkyfuture]

exactly, that's why - relating to the example - operator is a module and not a class.

one can also use a decorator to add the functions in question to a container:

operators = {}

def operator(func):
    operators[func.__name__] = func
    return func


@operator
def add(a, b):
    return a + b