What are Python decorators and how do they work?

What are Python decorators and how do they work?

Python decorators are functions that modify the behavior of another function. They are often used for logging, access control, and more.

Can you give me an example of a simple decorator?

Sure! Here's a simple decorator that prints 'Hello' before calling the function:

def my_decorator(func):
    def wrapper():
        print('Hello')
        func()
    return wrapper

@my_decorator
def say_hi():
    print('Hi!')

say_hi()  # This will print 'Hello' followed by 'Hi!'

What happens if I pass arguments to the decorated function?

Good question! You can modify the wrapper function to accept any arguments and pass them to the original function. Here's how:

def my_decorator(func):
    def wrapper(*args, **kwargs):
        print('Hello')
        return func(*args, **kwargs)
    return wrapper