How to use global value or local value

[Gribouillis]

Let's say scenario: We have hundreds of houses each having different internet speed: 5Mbps/100Mbps/25Mbps (so we have a class for each house). Then we have rooms/people in each house. If that person/room has a faster internet speed (lets say room1 for the house5), that room/person should not use houses internet, it should use it's own faster internet.... (use room variable rather than global house variable)

In that scenario, Room/Person are not subclasses of House because their relation is not the IS-A relationship. A room is not a particular kind of house. In that case it is better to use aggregation. Each room will have a pointer to the house to which it belongs

class House:
    def __init__(self, speed):
        self.speed = speed

class Room:
    def __init__(self, house):
        self.house = house
        self._speed = 0

    @property
    def speed(self):
        return max(self._speed, self.house.speed)

    def update_speed(self, value):
        self._speed = value

    def delete_speed(self):
        self._speed = 0

h1 = House(5)
h2 = House(100)
r1 = Room(h2)
r2 = Room(h2)
print(r1.speed)
print(r2.speed)
r1.update_speed(500)
print(r1.speed)
print(r2.speed)
print(h2.speed)
r1.delete_speed()
print(r1.speed)
r1.update_speed(50)
print(r1.speed)

Output:
100
100
500
100
100
100
100