Python

Decorators

import time

def measure_time(another_function):
  def wrapper():
    start = time.time()
    result = another_function() # Nested functions have access to variables from parent function
    end = time.time()
    print(f"Time taken for to execute hello_world is {end - start} seconds")
    return result
  return wrapper

@measure_time
def hello_world():
  print("Hello World")

# hello_world() # <-- Uncomment this line