What are decorators in Python and how do I use them?

What are decorators in Python and how do I use them?

Decorators are a way to modify or enhance functions or methods in Python. They are often used for logging, access control, and more.

Can you show me a simple example of a decorator?

Sure! Here's a basic 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()  # This will call the decorator.

What happens if I want to pass arguments to the decorated function?

You can modify the wrapper function to accept arguments. Here's an example:

def my_decorator(func):
    def wrapper(*args, **kwargs):
        print("Before calling the function.")
        result = func(*args, **kwargs)
        print("After calling the function.")
        return result
    return wrapper

@my_decorator
def greet(name):
    print(f"Hello, {name}!")

greet("Alice")