python爬虫案列11：爬取双色球历史开奖记录并存储到mysql

import requests
import pymysql
from lxml import etree
# 连接数据库
conn = pymysql.connect(
    host='localhost', port=3306, user='root', password='root', database='spider'
)
# 创建游标
cursor = conn.cursor()
url = 'http://datachart.500.com/ssq/'
resp = requests.get(url).text
# 解析数据
tree = etree.HTML(resp)
trs = tree.xpath('//*[@id="tdata"]/tr')
for tr in trs:
    if len(tr) != 1:  # 判断是否为空
        # 拿到想要的数据
        data = tr.xpath('./td[@align="center"]/text()')[0].strip()
        red = '_'.join(tr.xpath('./td[@class="chartBall01"]/text()'))
        blue = tr.xpath('./td[@class="chartBall02"]/text()')[0]
        # 执行sql语句
        sql = "insert into caipiao(data, red, blue) values(%s, %s, %s)"
        cursor.execute(sql, (data, red, blue))
        print("OK!")
# 关闭数据库连接
conn.close()