What is the decorator pattern in Python?

What is the decorator pattern in Python?

The decorator pattern allows you to add new functionality to an existing object without modifying its structure. It's often used in Python to enhance functions or methods.

Can you give me an example of how to implement a decorator?

Sure! Here's a simple example:

def my_decorator(func):
    def wrapper():
        print("Something is happening before the function is called.")
        func()
        print("Something is happening after the function is called.")
    return wrapper

@my_decorator
def say_hello():
    print("Hello!")

say_hello()

What are some common use cases for decorators?

Common use cases include logging, enforcing access control, caching results, and measuring execution time.

Are there built-in decorators in Python?

Yes, Python has several built-in decorators like @staticmethod, @classmethod, and @property.