print("Now defining class 'A'...")

class A:

    # define any initialization method here, name is irrelevant:
    def __my_class_constructor():  
        print("--> class initialized!")

    # this is the normal constructor, just to compare:
    def __init__(self):
        print("--> instance created!")

    # do whatever you want to initialize the class (e.g. call our method from above)
    __my_class_constructor()  

print("Now creating an instance object 'a' of class 'A'...")

a = A()