refactor_module_to_class.py

a, b = None, None

def __init__(a_, b_):
    global a, b
    a = a_
    b = b_
    

def add():
    return a+b
    
def mult():
    return a*b
    
def scale(k):
    global a, b
    a *= k
    b *= k
    
    
################# ----Refactor--->>

class Arithmetics(object):
        
    def __init__(self, a_, b_):
        global a, b
        self.a = a_
        self.b = b_

    def add(self):
        return self.a + self.b
        
    def mult(self):
        return self.a * self.b

    def scale(self, k):
        self.a *= k
        self.b *= k