Explain the purpose and benefits of using decorators in Python. Provide examples of different types of decorators you have implemented or used.

Decorators in Python are a powerful way to modify or extend the behavior of functions or methods. They are commonly used for tasks such as logging, timing, and caching. Here's an 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()