#-----函数装饰器-----
1、作用域：L _E_G_B
2、高阶函数 a、函数名可以作为参数输入 b、函数名可以作为返回值
3、闭包
1 def outer():
2 x = 10
3 def inner(): #inner是内部函数
4 print(x) #外部环境的一个变量
5 return inner #内部函数inner就是一个闭包
6 outer()()
7
8 #inner() #1、局部变量,全局变量无法调用
#-----关于闭包-----
闭包 = 函数 + 定义函数时的环境
#代码原则：开放封闭原则 代码书写原则(对修改封闭，对扩展开放)
#-----装饰器函数
1 import time
2
3 def show_time(f): #装饰器函数
4 def inner():
5 start = time.time()
6 f()
7 time.sleep(1)
8 end = time.time()
9 print("spend %s"% (end-start))
10 return inner
11
12 @show_time
13 def foo():
14 print('test')
15 #foo=show_time(foo)
16 foo()
17
18 @show_time
19 def bar():
20 print('bar')
21 # bar = show_time(bar)
22 bar()
23
24 def show_time(f):
25 def inner(x,y):
26 start = time.time()
27 f(x,y)
28 time.sleep(1)
29 end = time.time()
30 print(end-start)
31 return inner
32
33 @show_time
34 def add1(a,b):
35 print(a+b)
36 add1(1,2)
#-----装饰器加参数
1 def logger(flag='False'):
2 def show_time(f):
3 def inner(*args):
4 start_time = time.time()
5 f(*args)
6 time.sleep(1)
7 end_time = time.time()
8 print(end_time-start_time)
9 if flag == "True":
10 print('log!')
11 return inner
12 return show_time
13
14 @logger('True')
15 def add(*args):
16 sum1 = 0
17 for i in args:
18 sum1 += i
19 print(sum1)
20
21 add(1,2,4)
#-----用户信息登录验证小程序-----
#-----创建用名密码
1 import json
2
3 def create_user(a,b,c,d):
4 d = {
5 "name":a,
6 "passwd":b
7 }
8 with open(c,"w") as f:
9 json.dump(d,f)
10 create_user("dream","abc123","jd.json","jd_list")
11 create_user("rise","rise123","qq.json","qq_list")
12 create_user("wx","wx123","wx.json","wx_list")
#-----用户信息验证
1 import json
2
3 login_status = "False"
4 def login(auth_type):
5 def verify(func):
6 def inner():
7 global login_status
8 flag = True
9 while flag:
10 c_list = ['jd','qq','wx']
11 for i in c_list:
12 if auth_type == i.strip():
13 files = auth_type
14 u_name = input("please input %s name:" % files).strip()
15 u_passwd = input("please input %s passwd:" % files).strip()
16 with open(("%s.json") % files, "r") as f:
17 data = dict(json.load(f))
18 name = data["name"]
19 passwd = data["passwd"]
20 if u_name == name and u_passwd == passwd:
21 login_status = "True"
22 func()
23 flag = False
24 else:
25 func()
26 return inner
27 return verify
28
29 @login("jd")
30 def home():
31 print("welcome to home page")
32 home()
33
34 @login("qq")
35 def finance():
36 print("welcome to finance page")
37 finance()
38
39 @login("wx")
40 def book():
41 print("welcome to book page")
42 book()
