Generating menus with classes

[deanhystad]

In the code below, test() creates an instance of class test. It doesn't create a variable to reference the instance, but it still creates a test object.

class test :
    def __init__ (self) :
        print ('I am ALIVE!')
 
test()

The only difference between "test()" and "a = test()" is that "a = test()" creates a variable named "a" in the current scope and assigns it to reference the object return by test(). With or without a variable to reference it the object is created the same.

The same is true for HeyJoe's example. This code in Main.__init__ creates an instance of FirstMenu. Then the FirstMenu.__init__() create instances of SecondMenu which in turn creates an instance of ThirdMenu. There are no variables that reference the created objects, but the objects are still created. You should think about reworking the code. I don't think it is a good idea cascading code like that, and you obviously don't understand how it works. That is never a good thing.

I don't know where you got the idea that you need instances to use classes. A class can consist completely of class attributes and class variables and act just like a module.