Decorators

Decorator Factories

Decorator factories are functions that return decorators. They allow for creating decorators with parameters. This is useful when you need a decorator that can be configured at runtime.

def repeat(num_times):
    def decorator_repeat(func):
        def wrapper(*args, **kwargs):
            for _ in range(num_times):
                result = func(*args, **kwargs)
            return result
        return wrapper
    return decorator_repeat

@repeat(num_times=3)
def say_hello(name):
    print(f"Hello, {name}!")

say_hello("World") #Prints "Hello, World!" three times.

This example shows repeat as a decorator factory. It takes num_times as a parameter and returns a decorator (decorator_repeat) that will repeat the decorated function that many times. The inner function wrapper actually performs the repeated execution.

Key Points:

• A decorator factory is a higher-order function (a function that returns another function).
• It allows for creating decorators with customizable behavior.
• It increases the flexibility and reusability of decorators.

Related Notes:

• Decorators
• Higher-Order Functions
• Closures (because the inner functions in a decorator factory use closures)