python爬*大乐透历史数据

import requests                 #引用requests
import os                       #os
from bs4 import BeautifulSoup  # 从bs4引入BeautifulSoup
import csv
import codecs
import pymysql

# 连接数据库
connect = pymysql.Connect(
    host='127.0.0.1',
    port=3306,
    user='root',
    passwd='root',
    db='ess',
    charset='utf8'
)
# 获取游标
cursor = connect.cursor()

lst=[]
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36'
}
url='http://datachart.500.com/dlt/history/newinc/history.php?start=19091&end=21120'
r = requests.get(url, headers=headers)                     
r.encoding='utf-8'
text=r.text
soup = BeautifulSoup(text, "html.parser")
tbody=soup.find('tbody',id="tdata")
tr=tbody.find_all('tr')
lens = len(tr)
tda=tr[0].find_all('td')
for page in range(0,lens):
    td=tr[page].find_all('td')
    #存数据库
    try:
        sql = "INSERT INTO caipiao(qihao,num1,num2,num3,num4,num5,te1,te2) VALUES ('%s','%s','%s','%s','%s','%s','%s','%s')"
        data = (td[0].text,td[1].text,td[2].text,td[3].text,td[4].text,td[5].text,td[6].text,td[7].text)
        # self.cursor.execute(sql % data)
        # self.connect.commit()
        cursor.execute(sql % data)
        connect.commit()
        print('成功插入', cursor.rowcount, '条数据')
    except Exception as e:
        #print('数据插入错误')
        print('程序出错',e)
    #存csv excel
    lst.append([td[0].text,td[1].text,td[2].text,td[3].text,td[4].text,td[5].text,td[6].text,td[7].text])
    with open("Lottery_data.csv",'w') as csvfile:
        writer = csv.writer(csvfile)
        writer.writerow(['期号','号码1', '号码2', '号码3', '号码4', '号码5', '号码6', '号码7'])
        writer.writerows(lst)
csvfile.close()
print('succes')