Python @ Decorator Simple to understand

Personal learning python for a long time, but has always been here to pick a point where to learn, a little overwhelmed. Recently I want to see how the adorner used, and then studied the next.

Simple point of:

#!/usr/bin/python

def say (key): # Create a small function

print ' Your first love! '

Return key

@say

Def hold ():

print ' This is sercod world! '

Hold ()

A brief talk is @say

The Def hold () is a say wrap, the order of execution is say ("#参数就是 #hold function Overall #"), the simple is to put a function of the outer layer of a say function. But the final execution is hold, so the coat function say must point to hold, so the return value returns key----Here the key is the hold itself.

It's a bit of a mouthful, but it's good to understand. If you don't understand, there's no way.

This article is from the "Pang" blog, make sure to keep this source http://pangfei.blog.51cto.com/8832397/1731401

Python @ Decorator Simple to understand