What are function decorators in Python?

Can you explain what function decorators are in Python?

Sure! Function decorators are a way to modify or enhance functions in Python without changing their code. They are often used for logging, access control, or modifying input/output.

How do you create a function decorator?

To create a decorator, you define a function that takes another function as an argument and returns a new function that adds some functionality.

Can you give me an example of a simple decorator?

Absolutely! 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!')

What happens if I don't use the @ symbol?

If you don't use the @ symbol, you would need to manually wrap the function by calling the decorator function and passing the original function as an argument.