Decorators in Python

 Decorators in Python

Decorators are a way to modify the behavior of a function without changing its code. Here's an example of defining a simple decorator:

python

def my_decorator(func):

    def wrapper():

        print("Before the function is called.")

        func()

        print("After the function is called.")

    return wrapper

@my_decorator

def say_hello():

    print("Hello, world!")

In this example, we define a decorator function called my_decorator. The decorator function takes a function as its argument, and returns a new function called wrapper that modifies the behavior of the original function. We then use the @my_decorator syntax to apply the decorator to the say_hello function.

When we call the say_hello function, the decorator will add some additional behavior before and after the original function is called:

python

say_hello() # prints "Before the function is called.", "Hello, world!", "After the function is called."