Factory Pattern Under 1 minute - Software Design Pattern

❓ Problem:

You want to create objects without knowing their exact class or logic.

🧠 Analogy:

Think of a restaurant where you say “I want a sandwich” and the kitchen (factory) decides whether to make a veg or non-veg sandwich.

✅ Advantages:

• Centralized object creation

• Easy to introduce new types (add class, update factory)

• Reduces code duplication

⚠️ Pitfalls:

• Logic may grow messy if too many conditions are hardcoded

• If overused, can make code unnecessarily complex

class Notification:
    def send(self):
        pass

class Email(Notification):
    def send(self):
        print("Sending Email")

class SMS(Notification):
    def send(self):
        print("Sending SMS")

def notification_factory(type_):
    if type_ == "email":
        return Email()
    elif type_ == "sms":
        return SMS()
    else:
        raise ValueError("Unknown type")

notif = notification_factory("email")
notif.send()  # Sending Email

In larger apps, you can even use reflection or registration instead of if-else.