Design Patterns with Python Examples - Part 4

Overview: The Observer pattern defines a one-to-many relationship where changes in one object trigger updates in others. Example Use Case: A stock market ticker that notifies multiple observers (apps, dashboards) of price updates. class Subject : def __init__ ( self ): self . _observers = [] def attach ( self , observer ): self . _observers . append ( observer ) def detach ( self , observer ):…