The website is API（4）

1.淘宝商品信息定向爬虫

目标：获取淘宝搜索页面信息，提取其中的商品名称和价格

理解：淘宝的搜索接口

           翻页的处理

技术路线：requests+re

https://s.taobao.com/search?q=书包&imgfile=&js=1&stats_click=search_radio_all%3A1&initiative_id=staobaoz_20190920&ie=utf8

https://s.taobao.com/search?q=%E4%B9%A6%E5%8C%85&imgfile=&js=1&stats_click=search_radio_all%3A1&initiative_id=staobaoz_20190920&ie=utf8&bcoffset=3&ntoffset=3&p4ppushleft=1%2C48&s=44

https://s.taobao.com/search?q=%E4%B9%A6%E5%8C%85&imgfile=&js=1&stats_click=search_radio_all%3A1&initiative_id=staobaoz_20190920&ie=utf8&bcoffset=0&ntoffset=6&p4ppushleft=1%2C48&s=88

淘宝不允许任何形式的爬虫！！！请不要不加限制的爬取！

1.提交商品搜索请求，循环爬取页面

2.对于每个页面，提取商品名称和价格信息

3.将信息输出到屏幕上

import requests
import re

def getHTMLText(url):
    kv = {"cookie":"t=5c749e8d453e7e3664735746f5eb5de8; cna=BrXNFDenbXUCAXggNKX9H1bo; thw=cn; tg=0; enc=5LMRHD8305w3oo8X0agYVFUDa7Ox%2F4RBf34oCWap48nRHy%2B%2B1RZCWZJ7ebn%2Fpy7vRNIL8xpS%2Ba0oNFXG5nSu8w%3D%3D; hng=CN%7Czh-CN%7CCNY%7C156; cookie2=10dbf1309bd9a2d5bc9cabe562965aee; _tb_token_=ee67e1a3ee0e5; alitrackid=www.taobao.com; swfstore=308730; v=0; unb=2448224718; sg=%E6%BB%A18d; _l_g_=Ug%3D%3D; skt=d53506c42f2db259; cookie1=BxUHGXuG%2B5Y4Iw7vZCvjLJ0zDvFL2Xy3mjxT%2FRPtFeA%3D; csg=4246b77f; uc3=vt3=F8dByEzfiHo1%2FUIk8VY%3D&id2=UUwU0bQkq1tYDQ%3D%3D&nk2=CN5OZuI3Xv2%2BlbVX&lg2=W5iHLLyFOGW7aA%3D%3D; existShop=MTU1MDU2MTUyMQ%3D%3D; tracknick=king%5Cu4E36%5Cu5C0F%5Cu4E30%5Cu6EE1; lgc=king%5Cu4E36%5Cu5C0F%5Cu4E30%5Cu6EE1; _cc_=VFC%2FuZ9ajQ%3D%3D; dnk=king%5Cu4E36%5Cu5C0F%5Cu4E30%5Cu6EE1; _nk_=king%5Cu4E36%5Cu5C0F%5Cu4E30%5Cu6EE1; cookie17=UUwU0bQkq1tYDQ%3D%3D; lastalitrackid=login.taobao.com; mt=ci=5_1; x=e%3D1%26p%3D*%26s%3D0%26c%3D0%26f%3D0%26g%3D0%26t%3D0%26__ll%3D-1%26_ato%3D0; uc1=cookie14=UoTZ5OXqJxXKdA%3D%3D&lng=zh_CN&cookie16=W5iHLLyFPlMGbLDwA%2BdvAGZqLg%3D%3D&existShop=false&cookie21=UIHiLt3xThH8t7YQouiW&tag=8&cookie15=UIHiLt3xD8xYTw%3D%3D&pas=0; JSESSIONID=F99B5E66516B99D5E7C9F431E402713F; l=bBNU0zKPvJ9oGfuLBOCNZuI8LN_OGIRYjuPRwCfMi_5B46JhzLQOllv3_FJ6Vj5RsK8B4z6vzNp9-etki; isg=BDg4VI5GkPAaMvx83RJGSPCNCeYKCZ0m9uCVOHKp6XNmjdh3GrU6uo2vQcWY5lQD; whl=-1%260%260%261550562673185",
          "user-agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"}
    
    try:
        r = requests.get(url,headers = kv,timeout = 30)
        r.raise_for_status()
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return ""

def parsePage(ilt,html):
    try:
        plt = re.findall(r'"view_price":"[d.]*"',html)
        tlt = re.findall(r'"raw_title":".*?"',html)
        for i in range(len(plt)):
            price = eval(plt[i].split(':')[1])
            title = eval(tlt[i].split(':')[1])
            ilt.append([price,title])
    except:
        print("")

def printGoodsList(ilt):
    tplt = "{:4}	{:8}	{:16}"
    print(tplt.format("序号","价格","商品名称"))
    count = 0
    for g in ilt:
        count = count +1
        print(tplt.format(count,g[0],g[1]))

def main():
    goods = '书包'
    depth = 5
    start_url = 'https://s.taobao.com/search?q='+goods
    infoList = []
    for i in range(depth):
        try:
            url = start_url + '&s='+str(44*i)
            html = getHTMLText(url)
            parsePage(infoList,html)
        except:
            continue
    printGoodsList(infoList)

main()
            
    

注意：KV的加入是爬虫成功的关键！