爬取淘宝网的商品信息！淘宝可是很难爬的哦！双十一你剁手了吗！

一、思路

首先，从命令行参数列表中，提取出要爬取商品的关键词，根据关键词拼接URL，请求相应的URL，然后利用Xpath从响应页面中提取商品信息，最后将商品信息存储到数据库即可

1、根据关键词搜索

https://re.taobao.com/search?keyword=
1

通过参数传入关键词，然后进行URL拼接

def spider(key_word):
    for i in range(totalPages):
        request_url = url + key_word + "&page=" + str(i)
        response = requests.get(request_url, headers)
        parse(response.text)


def main():
    if len(sys.argv) < 1:
        print("缺少参数！")
        exit(0)
    for index, key in enumerate(sys.argv):
        if index != 0:
            spider(key)
    connect.close()

2、数据提取

这里用Xpath从网页中提取想要的商品信息,也可以使用正则或者BeautifulSoup库

def parse(text):
    html = etree.HTML(text)
    div_list = html.xpath('//div[@id="J_waterfallWrapper"]/div[@class="item"]')
    result = []
    for div in div_list:
        commodity_url = ''.join(div.xpath('./a/@href'))
        commodity_title = ''.join(div.xpath('./a/div[@class="info"]/span/@title'))
        price = ''.join(div.xpath('./a/div[@class="info"]/p[@class="price"]/span/strong/text()'))
        shop_name = ''.join(div.xpath('./a/div[@class="info"]/p[@class="shopName"]/span[1]/text()'))
        li_list = div.xpath('./a/div[@class="info"]/div[@class="moreInfo"]/div[@class="dsr-info"]/ul/li')
        truth = ''.join(li_list[0].xpath('./span[@class="morethan"]/b/text()'))
        service = ''.join(li_list[1].xpath('./span[@class="morethan"]/b/text()'))
        speed = ''.join(li_list[2].xpath('./span[@class="morethan"]/b/text()'))
        commodity = {
            'commodity_url': commodity_url,
            'commodity_title': commodity_title,
            'price': price,
            'shop_name': shop_name,
            'truth': truth,
            'service': service,
            'speed': speed,
        }
        result.append(commodity)
    save(result)

3、数据保存

将数据保存到MySQL中

def save(items):
    sql = "insert into commodity(id,url,title,price,shop_name,truth,service,speed) values(null,%s,%s,%s,%s,%s,%s,%s)"
    for item in items:
        cursor.execute(sql, (
            item['commodity_url'],
            item['commodity_title'],
            item['price'],
            item['shop_name'],
            item['truth'],
            item['service'],
            item['speed']
        ))
        print(item)
    connect.commit()

二、结果

三、源代码

import sys
import requests
import pymysql
from lxml import etree

url = "https://re.taobao.com/search?keyword="
headers = {
    "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) "
                  "Chrome/86.0.4240.111 Safari/537.36 Edg/86.0.622.58 "
}
totalPages = 100
connect = pymysql.connect(host="127.0.0.1", user="root", password="root", database="taobao", charset="utf8mb4")
cursor = connect.cursor()


def save(items):
    sql = "insert into commodity(id,url,title,price,shop_name,truth,service,speed) values(null,%s,%s,%s,%s,%s,%s,%s)"
    for item in items:
        cursor.execute(sql, (
            item['commodity_url'],
            item['commodity_title'],
            item['price'],
            item['shop_name'],
            item['truth'],
            item['service'],
            item['speed']
        ))
        print(item)
    connect.commit()


def parse(text):
    html = etree.HTML(text)
    div_list = html.xpath('//div[@id="J_waterfallWrapper"]/div[@class="item"]')
    result = []
    for div in div_list:
        commodity_url = ''.join(div.xpath('./a/@href'))
        commodity_title = ''.join(div.xpath('./a/div[@class="info"]/span/@title'))
        price = ''.join(div.xpath('./a/div[@class="info"]/p[@class="price"]/span/strong/text()'))
        shop_name = ''.join(div.xpath('./a/div[@class="info"]/p[@class="shopName"]/span[1]/text()'))
        li_list = div.xpath('./a/div[@class="info"]/div[@class="moreInfo"]/div[@class="dsr-info"]/ul/li')
        truth = ''.join(li_list[0].xpath('./span[@class="morethan"]/b/text()'))
        service = ''.join(li_list[1].xpath('./span[@class="morethan"]/b/text()'))
        speed = ''.join(li_list[2].xpath('./span[@class="morethan"]/b/text()'))
        commodity = {
            'commodity_url': commodity_url,
            'commodity_title': commodity_title,
            'price': price,
            'shop_name': shop_name,
            'truth': truth,
            'service': service,
            'speed': speed,
        }
        result.append(commodity)
    save(result)


def spider(key_word):
    for i in range(totalPages):
        request_url = url + key_word + "&page=" + str(i)
        response = requests.get(request_url, headers)
        parse(response.text)


def main():
    if len(sys.argv) < 1:
        print("缺少参数！")
        exit(0)
    for index, key in enumerate(sys.argv):
        if index != 0:
            spider(key)
    connect.close()


if __name__ == '__main__':
    main()

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