decorators inside python3 code example

Example 1: python decorators

# decorators are user to decorate functions like what to do before/after calling the function
import time

def delay_decorator(function):
    def wrapper_function():
        print("-----------------------I am gonna greet you--------------------------")
        time.sleep(2)# waits for 2 seconds
        function()   # calls the function
        time.sleep(1)# waits for 1 sec
        print("------------------How do you feel about that greet?-------------------")
    return wrapper_function

@delay_decorator
def greet():
    print("Helllllloooooooooo")

greet()

Example 2: python decorator

#Decorator are just function that take function as first
#parameter and return a function
def logging(f):
  def decorator_function(*args, **kwargs):
    print('executing '+f.__name__)
    return f(*args, **kwargs)
  return decorator_function
#Use it like this
@logging
def hello_world():
  print('Hello World')
#calling hello_world() prints out:
#executing hello_world
#Hello World