Modify variables with a static method

Question

I know static methods should be kept to a minimum and the whole idea of static methods is that they don't interact with the class but is there a way to do it?

Requirements:

class System with 2 attributes - divisible and obvisible, which are empty lists

static method register_divisible(name) takes parameter name and appends it to divisible

Example:

class System:
    def __init__(self):
        self.divisible = []
        self.obvisible = []

    @staticmethod
    def register_divisible(name):
        self._divisible.append(name)

Answer 1

For this requirement, you have to define divisible and obvisible outside of the constructor and refer variable with class name instead of self

class System:
    divisible = []
    obvisible = []

    @staticmethod
    def register_divisible(name):
        System.divisible.append(name)

#Instance        
a=System()
a.register_divisible('one')

#Static
System.register_divisible("two")

print(a.divisible) #prints ['one','two']
print(System.divisible) #prints ['one','two']