x='Tomwenxing'
y=x

def test():
  pass

import time
def bar():
  time.sleep(2)
  print('in the bar')
def test(func):
  start_time=time.time()
  func()
  stop_time=time.time()
  print('函數(shù)的運(yùn)行時(shí)間為:',stop_time-start_time)
test(bar)

import time
def bar():
  time.sleep(3)
  print('in the bar')
def test2(func):
  print('新添加的功能')
  return func
bar=test2(bar)
bar()

def foo():
  print('in the foo')
  def bar(): #聲明一個(gè)新的函數(shù)，而不是調(diào)用函數(shù)
    print('in the bar')
  bar()
foo()

import time
def timer(func):
  def deco(*args,**kwargs):#使用了不定參數(shù)
    start_time=time.time()
    res=func(*args,**kwargs) #運(yùn)行函數(shù)
    stop_time=time.time()
    print('運(yùn)行時(shí)間:',stop_time-start_time)
    return res # 若無(wú)返回值，則返回None
  return deco
@timer #等價(jià)于test1=timer(test1)=deco,即test1()=deco()
def test1():
  time.sleep(3)
  print('in the test1')
@timer #等價(jià)于test2=timer(test2)=deco,即test2(name)=deco(name)
def test2(name):
  time.sleep(3)
  print('in the test2',name)
test1()
print('-------------分界線------------------------')
test2('Tomwenxing')

# -*- coding:utf-8 -*-
user,passwd='Tomwenxing','123'
#如裝飾器帶參數(shù)，一般是三層嵌套
def auth(auth_type): #第一層的參數(shù)是裝飾器的參數(shù)
  def outer_wrapper(func):#第二層的參數(shù)是裝飾器要裝飾的目標(biāo)函數(shù)
    def wrapper(*args,**kwargs):#第三次的參數(shù)是目標(biāo)函數(shù)的參數(shù)
      if auth_type=='local':
        username = input('Username:').strip()
        password = input('Password:').strip()
        if user == username and passwd == password:
          print('用戶Tomwenxing已經(jīng)成功登錄！')
          res = func(*args, **kwargs) #運(yùn)行目標(biāo)函數(shù)
          return res
        else:
          exit('用戶名或密碼有錯(cuò)誤')
      elif auth_type=='ldap':
        print('暫不支持這種登錄方式！')
    return wrapper
  return outer_wrapper
def index():
  print('歡迎來(lái)到index頁(yè)面')
@auth(auth_type='local') #home=wrapper()
def home(name):
  print('%s,歡迎來(lái)到home頁(yè)面' %name)
  return 'This is home page'
@auth(auth_type='ldap')
def bbs():
  print('歡迎來(lái)到bbs頁(yè)面 ')
index()
print('----------------------分界線-------------------')
print('函數(shù)的返回值為:',home('wenxing'))
print('----------------------分界線-------------------')
bbs()