import timedef timmer(fun):start_time=time.time()fun()end_time=time.time()def fun1():print("in func1")timmer(fun1)   #改变了原先函数的执行

import timedef timmer(fun):def inner():start_time=time.time()fun()end_time=time.time()print("run in {} time {}".format(fun,end_time-start_time))return inner   #实际上是把函数名字传递给timmer,timmer执行,之所以返回inner是因为inner在全局不可以被调用def fun1():print("in func1")print(timmer(fun1))    #可以运行,其实就是执行Inner,目的就是在全局可以调用,
fun1=timmer(fun1)     #函数本身就是变量,变量值互换
fun1()

import timedef timmer(fun):def inner(*args,**kwargs):start_time=time.time()ret = fun(*args,**kwargs)end_time=time.time()print("run in {} time {}".format(fun,end_time-start_time))return  retreturn inner   #实际上是把函数名字传递给timmer,timmer执行,之所以返回inner是因为inner在全局不可以被调用@timmer
def fun1(num):print("in func1 {}".format(num))return 123# print(timmer(fun1))    #可以运行,其实就是执行Inner,目的就是在全局可以调用,
# fun1=timmer(fun1)      #函数本身就是变量,变量值互换
print(fun1(1))

import timedef outer():Flag=Falsedef timmer(fun):def inner(*args,**kwargs):if Flag:start_time=time.time()ret = fun(*args,**kwargs)end_time=time.time()print("run in {} time {}".format(fun,end_time-start_time))return retelse:ret = fun(*args, **kwargs)return retreturn inner   #实际上是把函数名字传递给timmer,timmer执行,之所以返回inner是因为inner在全局不可以被调用return timmer   @outer()           #之所以加执行就是把outer的返回值timmer函数的内存地址放在这里,其实就是@timmer
def fun1(num):print("in func1 {}".format(num))return 1@outer()
def fun2(num):print("in func2 {}".format(num))return 2@outer()
def fun3(num):print("in func3 {}".format(num))return 3print(fun1(1))
print(fun2(2))
print(fun3(3))

login_status={"user":None,"status":False}def outer():Flag=Truedef auth(func):def inner(*args,**kwargs):if Flag:with open("user.txt",encoding="utf-8") as read_f:if login_status['user'] and login_status['status']:ret = func(*args, **kwargs)return retuser_info=eval(read_f.read())name=input("your name>>:").strip()password=input("your password>>:").strip()if name in user_info and user_info[name]["password"] == password:login_status["user"]=namelogin_status["status"]=Trueprint(login_status)ret = func(*args,**kwargs)return  retelse:print("bad")else:ret = func(*args, **kwargs)return retreturn innerreturn auth@outer()
def fun1():print("in func1")return 1@outer()
def fun2():print("in func2")return 2@outer()
def fun3():print("in func3")return 3fun1()
fun2()
fun3()

def wrapper1(func):def inner():print('wrapper1 ,before func')func()print('wrapper1 ,after func')return innerdef wrapper2(func):def inner():print('wrapper2 ,before func')func()print('wrapper2 ,after func')return inner@wrapper2
@wrapper1
def f():print('in f')f()

#编写下载网页内容的函数，要求功能是：用户传入一个url，函数返回下载页面的结果
import time
from urllib.request import urlopendef wrapper(func):def inner(*args,**kwargs):start_time=time.time()ret = func(*args,**kwargs).decode('utf-8')end_time=time.time()print("{} time is {}".format(*args,end_time-start_time))return retreturn inner@wrapper
def get(url):return urlopen(url).read()# print(get('http://www.baidu.com'))
get('http://www.baidu.com')

from collections import Iterablel = [1, 2, 3, 4]
t = (1, 2, 3, 4)
d = {1: 2, 3: 4}
s = {1, 2, 3, 4}print(isinstance(l, Iterable))
print(isinstance(t, Iterable))
print(isinstance(d, Iterable))
print(isinstance(s, Iterable))
print(dir([1,2]))

l=[1,2,3,4]
l_iter=l.__iter__()          #先把可迭代对象变成迭代器
print(l_iter.__next__())     #依次取值
print(l_iter.__next__())     #依次取值
print(l_iter.__next__())     #依次取值
print(l_iter.__next__())     #依次取值

l=[1,2,3,4]
l_iter=l.__iter__()          #先把可迭代对象变成迭代器
# print(l_iter.__next__())     #依次取值
# print(l_iter.__next__())     #依次取值
# print(l_iter.__next__())     #依次取值
# print(l_iter.__next__())     #依次取值while True:try:item = l_iter.__next__()print(item)except StopIteration:break

def genrator_fun1():a=1yield ab=2yield bg=genrator_fun1()
print(next(g))
print(next(g))
#生成器监听文件输入的例子