How do I use decorators in Python?

How do I use decorators in Python?

Decorators in Python are a way to modify or enhance functions or methods. They are defined using the '@' symbol followed by the decorator function name.

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_hello():
    print('Function is called!')

say_hello()  # This will print 'Hello' and then 'Function is called!'

What 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')
        return func(*args, **kwargs)
    return wrapper

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

greet('Alice')  # This will print 'Before calling the function' and then 'Hello, Alice!'