Observer API Documentation

class Observer(*args, **kwargs)[source]

Interface for observers that listen for updates from a subject.

update(state)[source]

Called by the subject to notify the observer of a state change.

class Subject[source]

Manages observers and notifies them of state changes.

__init__()[source]: Initialize the Subject with an empty list of observers and a default state.

attach(observer)[source]

Add an observer to the subject.

detach(observer)[source]

Remove an observer from the subject.

Notify all attached observers of the current state.

set_state(state)[source]

Update the subject’s state and notify observers.

Retrieve the current state of the subject.

class ConcreteObserver(name)[source]

Bases: object

Concrete implementation of an observer.

__init__(name)[source]

Initialize the concrete observer with a given name.

update(state)[source]

Receive an update from the subject.