I’m trying to understand the concept of the Delegation programming technique.

Composition:

class Engine:
    def start(self):
        return "Engine started"

class Car:
    def __init__(self):
        self.engine = Engine()  # Composition: Car has an Engine

    def drive(self):
        return self.engine.start()

# Usage
car = Car()
print(car.drive())  # Output: Engine started

Dependency Injection:

class Engine:
        def start(self):
            return "Engine started"

class Car:
    def __init__(self, engine):
        self.engine = engine  # Dependency Injection

    def drive(self):
        return self.engine.start()

# Usage
car = Car(Engine())
print(car.drive())  # Output: Engine started

Most websites I’ve searched, when trying to explain delegation, either use something equal to composition, or something equal to dependency injection…

Any help would be appreciated.