What are some advanced examples of Python decorators?

Can you explain what Python decorators are?

Sure! Python decorators are a way to modify or enhance functions or methods without changing their code. They are often used for logging, access control, and caching.

Can you give me some advanced examples of decorators?

Absolutely! One advanced example is a decorator that caches the results of a function based on its arguments, which can improve performance.

How would I implement a caching decorator?

You can use a dictionary to store results. Here's a simple implementation:

def cache(func):
    results = {}
    def wrapper(*args):
        if args not in results:
            results[args] = func(*args)
        return results[args]
    return wrapper

What about decorators with arguments?

For decorators with arguments, you can create a function that returns a decorator. Here's an example:

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