1.套模板

def init(func):    def wrapper(*args,**kwargs):        res=func(*args,**kwargs)        next(res)        return res    return wrapper

 

def init(func):    def wrapper(*args,**kwargs):        res=func(*args,**kwargs)        next(res)        return res    return wrapper@init   #eater=init(eater)def eater(name):    print('%s start to eat' % name)    food_list=[]    while True:        food = yield food_list        print('%s eat %s' %(name,food))        food_list.append(food)e = eater('zhejiangF4')  #wrapper('zhejiangF4')#e.send('123')print(e.send('123'))print(e.send('123'))print(e.send('123'))zhejiangF4 start to eatzhejiangF4 eat 123['123']zhejiangF4 eat 123['123', '123']zhejiangF4 eat 123['123', '123', '123']

　　

2.作业1

1 ''' 2 文件名：a.txt，文件内容如下： 3 apple 10 3 4 tesla 100000 1 5 mac 3000 2 6 lenovo 30000 3 7 chicken 10 3 8  实现功能：cat a.txt|grep apple 9     要求1：实现迭代器函数cat10     要求2：定义迭代器函数grep11     要求3：模拟管道的功能，将cat的处理结果作为grep的输入12     # cat a.txt | grep apple13 # 定义迭代器cat14 # 定义迭代器grep15 # 模拟管道功能, 将cat的处理结果作为grep的输入16 '''17 def cat(file):18     with open(file) as f:19         for line in f:20             yield line.strip()21 22 def grep(keywords,lines):23     for line in lines:24         if keywords in line:25             yield line26 g1 = cat('b.txt')27 g2 = grep('apple',g1)28 for i in g2:29     print(i)

 

 

 

3.作业2

#!/usr/bin/env python3# -*- coding: utf-8 -*-# 生成器的应用, 将下面的函数改为协程函数, 用send来发送url# def get(url):#     def index():#         return urlopen(url).read()#     return indexfrom urllib.request import  urlopendef get():    while True:　　　　　　 #while不断做这个事。做一个死循环.  (如果没有while根据next传值send传值做几次)        url=yield         #初始化过了，从暂停位置开始走，把send里面的值传给它yield，把yield的值再给url，在往下执行res，再打印        res=urlopen(url).read()        print(res)g=get()next(g)         #初始化一下，让函数停在那个位置g.send('http://www.python.org')##爬网页