helper_methods_for_class

class Math:
    def __init__(self, a, b, operator):
        self.a = a
        self.b = b
        self.operator = operator

    def make_calculations(self):
        if self.operator == "+":
            return self._add(self.a, self.b)
        elif self.operator == "-":
            return self._subtract(self.a, self.b)

    # Helper methods for the class
    def _add(self, x, y):
        return x + y

    def _subtract(self, x, y):
        return x - y


obj = Math(10, 5, "+")
print(obj.make_calculations())

obj = Math(10, 5, "-")
print(obj.make_calculations())