How to initialize a python class variable outside of functions?

Question

I have a python function:

class MyClass:
   my_class_variable: str = Optional[None]

   @classmethod
   def initialize(cls):
      cls.my_class_variable = cls.some_function()

I plan to use it like:

x = MyClass.my_class_variable

How can I guarantee have my_class_variable to have initialized with a value, eg how can I force call initialize() ?

Answer 1

you could do something like :

def dec(cls):
    cls.my_class_var = cls.some_func()
    return cls
@dec
class MyClass:
    my_class_var = ""

    @classmethod
    def some_func(cls):
        return "Cool :)"

print(MyClass.my_class_var) --> Cool :)

Another option would be to use a metaprogramming, but as long as there is only one simple thing to do, I would use a decorator :)