Python Code：装饰器

Learning Note：
本文是关于Python中装饰器的使用的说明。

Code：

#coding:utf-8

# Importing
import time

__author__ = 'adamhuan'

# Start
def start_here(name):
    def relation_function(max_by_userinput):
        def print_me(a):
            print "Created by：",name
            max_by_userinput(a)
            #print "End，..."
        return print_me
    return relation_function

def finished_time(max_by_userinput):
    def print_me_end(a):
        max_by_userinput(a)
        print "Finished：",time.strftime('%Y-%m-%d %H:%M:%S')
    return print_me_end

# Define Function
def return_max(*args):
    print "最大值为：",max(args)


@start_here("Adamhuan")
@finished_time
def max_by_userinput(user_input):
    user_input_list = user_input.split(',')
    user_input_list_size = len(user_input_list)
    string_exec = "return_max("

    for loop_count in xrange(user_input_list_size):
        if (loop_count == (user_input_list_size-1)):
            string_exec += "user_input_list[" + str(loop_count) + "])"
        else:
            string_exec += "user_input_list[" + str(loop_count) + "],"
    exec string_exec

# Running
user_input = raw_input("Input Something（以“,”分隔）：")
print "你的输入为：",user_input

print "————————————"

# The Max
max_by_userinput(user_input)

#-----------------------------------
# Ending。

#coding:utf-8

# Importing

import time

__author__ = 'adamhuan'

# Start

def start_here(name):

def relation_function(max_by_userinput):

def print_me(a):

print "Created by：",name

max_by_userinput(a)

#print "End，..."

return print_me

return relation_function

def finished_time(max_by_userinput):

def print_me_end(a):

max_by_userinput(a)

print "Finished：",time.strftime('%Y-%m-%d %H:%M:%S')

return print_me_end

# Define Function

def return_max(*args):

print "最大值为：",max(args)

@start_here("Adamhuan")

@finished_time

def max_by_userinput(user_input):

user_input_list = user_input.split(',')

user_input_list_size = len(user_input_list)

string_exec = "return_max("

for loop_count in xrange(user_input_list_size):

if (loop_count == (user_input_list_size-1)):

string_exec += "user_input_list[" + str(loop_count) + "])"

else:

string_exec += "user_input_list[" + str(loop_count) + "],"

exec string_exec

# Running

user_input = raw_input("Input Something（以“,”分隔）：")

print "你的输入为：",user_input

print "————————————"

# The Max

max_by_userinput(user_input)

#-----------------------------------

# Ending。

执行效果如下：

C:\Python27\python.exe D:/adamhuan_data/Python_Project/AboutFunction/AboutFunction.py
Input Something（以“,”分隔）：23,490,549,34.2
你的输入为： 23,490,549,34.2
————————————
Created by： Adamhuan
最大值为： 549
Finished： 2015-03-19 14:15:29

Process finished with exit code 0