In [1]:

    

def shout(word="yes"):
    return word.capitalize()+"!"
 
print(shout())

scream = shout
 
print(scream())
 
del shout
try:
    print(shout())
except NameError, e:
    print e
 
print(scream())


    

    




Yes!
Yes!
name 'shout' is not defined
Yes!

In [2]:

    

def talk():
    def whisper(word="yes"):
        return word.lower()+"...";

    print whisper()


    

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talk()
 
try:
    print whisper()
except NameError, e:
    print e


    

    




yes...
name 'whisper' is not defined

In [4]:

    

def getTalk(type="shout"):
    def shout(word="yes"):
        return word.capitalize()+"!"
 
    def whisper(word="yes") :
        return word.lower()+"...";

    if type == "shout":
        return shout
    else:
        return whisper


    

In [5]:

    

talk = getTalk()

print talk
print talk()
print getTalk("whisper")()


    

    




<function shout at 0x7f86e43b1b90>
Yes!
yes...

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def doSomethingBefore(func):
    print "Doing something before... the call"
    print func()


    

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doSomethingBefore(scream)


    

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def my_shiny_new_decorator(a_function_to_decorate):
    def the_wrapper_around_the_original_function():
        print "Code before the call"

        a_function_to_decorate()

        print "Call after the call"

    return the_wrapper_around_the_original_function


    

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def a_stand_alone_function():
    print "Single function.... Lonely... so lonely"


    

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a_stand_alone_function()
a_stand_alone_function_decorated = my_shiny_new_decorator(a_stand_alone_function)
a_stand_alone_function_decorated()


    

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a_stand_alone_function = my_shiny_new_decorator(a_stand_alone_function)
a_stand_alone_function()


    

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@my_shiny_new_decorator
def another_stand_alone_function():
    print "Just live me alone..."


    

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another_stand_alone_function()


    

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another_stand_alone_function = my_shiny_new_decorator(another_stand_alone_function)


    

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