Mediator Pattern in Python

class ChatRoom:
    # Mediator: route colleague communication through a coordinator.
    def send(self, sender, recipient, message):
        # Coordinate communication between colleague objects.
        recipient.receive(sender.name, message)


class User:
    def __init__(self, name, room): self.name, self.room = name, room
    def send(self, recipient, message): self.room.send(self, recipient, message)
    def receive(self, sender, message): print(f"{self.name} from {sender}: {message}")


room = ChatRoom()
ada, lin = User("Ada", room), User("Lin", room)
ada.send(lin, "Hello")