The path to Python, 12th: Introduction to Python and Basics 12

Python3 function 3

Adorner Decorator * * *

Concept: An adorner is a function that is primarily used to wrap another function or class;

The purpose of packaging is to change the behavior of the wrapped function (object) without changing the name of the original function.

Adorner function: def adorner function name (parameter):

function block

return function

Example:

def deco (FN):

Print ("The adorner function is called and returns the original function")

RETURN fn

With adorner function syntax:

@ Adorner function name [(Adorner function pass parameter)] < line break >

def function name (parameter list):

Statement block

Note: [] representative can omit

1 defDeco (FN):2     Print("the adorner is called and the original function is returned")3     Print(FN)4     returnfn5     #return Lambda:p rint ("Hello,world")6 7 @deco8 defMYFAC ():9     Print("MYFAC is called")Ten  One #MYFAC = Deco (MYFAC) A MYFAC () - MYFAC () - # the defDeco (FN): -     Print("the adorner is called and the original function is returned") -     Print(FN) -     #return FN +     return  Lambda:Print("Hello,world") -  + @deco A defMYFAC (): at     Print("MYFAC is called") -  - #MYFAC = Deco (MYFAC) - MYFAC () - MYFAC () - # in #the adorner is called and the original function is returned - #<function MYFAC at 0x00000000006766a8> to #MYFAC is called + #MYFAC is called - #the adorner is called and the original function is returned the #<function MYFAC at 0x00000000005acb70> * #Hello,world $ #Hello,world

View Code

The path to Python, 12th: Introduction to Python and Basics 12