python decorate example

wrapper_sample.py

#!/usr/bin/env python

def dec(fn):
    def inner_fn(*args):
        result = fn(*args)
        print "the result is: " + result
        return result

    return inner_fn

@dec
def hello():
    print 'execute'
    return 'hello'

hello()

def hello():
    print 'execute'
    return 'hello'

hello()