Events in Python: A Deep, Unforgettable Guide to Event-Driven Thinking
Introduction Imagine a doorbell. You press it (something happens), the chime sounds (a reaction happens), and perhaps a camera starts recording (another reaction). You don’t call the chime function directly. You signal that “an event occurred,” and any number of listeners react. That’s the core of events in software: something happens, interested parties respond. Events are everywhere—GUI buttons, network sockets becoming readable, a file changing, a business action like “order_placed,” or a job finishing. In Python, you can use events via libraries (Tkinter, Qt, asyncio, Django signals), operating-system interfaces (selectors), or create your own event systems. ...