Python Decorators

In this example:
my_decorator is a decorator function that takes another function (func) as an argument.
wrapper is a nested function inside the decorator. It performs some actions before and after calling the original function (func).
The @my_decorator syntax is a shorthand for applying the decorator to the say_hello function.
When say_hello("Alice") is called, it is equivalent to my_decorator(say_hello)("T & M"). The wrapper function is executed, adding behavior before and after the original function call.