Python Decorators - 3

Decorators.py

################################################
# What are decorators?
# Bascially a wrapper function, which modify the behaviour of a function, without
# changing the functionality of the original function.

# What problem do they actually solve?
# They alter the functionality of a function or a class.
#################################################

# Some original function, whose source we don't want to modify for some reason.
def get_text(name):
   return "Hola {0}! Fuck you anyway!".format(name)

def p_decorate(func):
   # Here, you modify the behaviour of any function, that takes a string as
   # an argument and returns a string.
   def func_wrapper(name):
       return "<p>{0}</p>".format(func(name))
   return func_wrapper

my_get_text = p_decorate(get_text)
print my_get_text("John")

#################################################
# Same fuctinality, using the @ operator
#################################################
def a_decorate(func):
   def func_wrapper(name):
       return "<p>{0}</p>".format(func(name))
   return func_wrapper

# This means, the functionality of get_txt is modified by the a_decorate function.
@a_decorate
def get_txt(name):
   return "Hola {0}! Fuck you anyway!".format(name)

print get_txt("John")