Function decorators in Python

In this post, we will see about function decorators in Python.

What is a function decorator?

A decorator is a function that takes a function as an argument and returns a function.
These are useful to wrap the functionality with the same code.

Consider the below code,

def add_outer (str):
  
  def add_inside ():
    return "Hello"
  
  return add_inside() + str
  
def add(name):
  return name

print(add_outer(add(" Mani")))

This will output,

Hello Mani

Now if we use decorator we can simply do it as,

def add_outer (fun):
  
  def add_inside (name):
    return "Hello" + fun(name)
  
  return add_inside
  
@add_outer
def add(name):
  return name

print(add(" Mani"))

What is a function decorator?

Check Output Here