Decorators

def uppercase_decorator(function):
    def wrapper(*args,**kwargs):
        func = function(*args,**kwargs)
        make_uppercase = func.upper()
        return make_uppercase
    return wrapper

def func():
    return "hello world"

func = uppercase_decorator(func)

func()

'HELLO WORLD'

@uppercase_decorator
def func1():
    return "hello world 1"

func1()

'HELLO WORLD 1'

timer example

from time import time,sleep

def timeit(f):
    def wrapper(*args,**kwargs):
        start = time()
        val = f(*args,**kwargs)
        end = time()

        print("total time taken for this function :",f.__name__," is",end-start)
        return val
    return wrapper

@timeit
def slow_operation():
    sleep(3)
    return "done"

slow_operation()

total time taken for this function : slow_operation  is 3.0030782222747803

'done'