网络爬虫爬取中国大学排名，并存入数据库

#CrawUnivRanjingA.py
import requests
from bs4 import BeautifulSoup
import bs4
import pymysql

db=pymysql.connect(host="localhost",user="root",password="admin",db="test",port=3306)
print('数据库连接成功')
cursor=db.cursor()
# cursor.execute()
# sql = """CREATE TABLE Daxue (
#   排名 int(3) NOT NULL,
#   学校名称 CHAR(10),
#   总分 float (2),
#   省市 varchar(10))"""





def getHTMLtEXT(url):
    try:
        r=requests.get(url,timeout=30)
        r.raise_for_status()
        r.encoding=r.apparent_encoding
        return r.text
    except:
        return ""

def fillUnivList(ulist,html):
    a=0
    soup=BeautifulSoup(html,"html.parser")
    for tr in soup.find('tbody').children:
         if isinstance(tr,bs4.element.Tag):
             tds=tr('td')
             ulist.append([tds[0].string,tds[1].string,tds[3].string,tds[2].string])
             paiming=tds[0].text.strip()
             xuexiaomingcheng=tds[1].text.strip()
             zongfeng=tds[3].text.strip()
             shengshi=tds[2].text.strip()
             if a<20:
                 insert_into = ("INSERT INTO Daxue(排名,学校名称,总分,省市)""VALUES(%s,%s,%s,%s)")
                 data_into=(paiming,xuexiaomingcheng,zongfeng,shengshi)
                 cursor.execute(insert_into,data_into)
                 db.commit()
                 a+=1

def PrintUnivlist(ulist,NUM):
    tplt="{0:<10}\t{1:{4}<10}\t{2:<10}\t{3:<10}"
    print(tplt.format("排名","学校名称","总分","省市",chr(12288)))
    for i in range(NUM):
        u=ulist[i]
        print(tplt.format(u[0],u[1],u[2],u[3],chr(12288)))

def main():
    uinfo=[]
    url="http://www.zuihaodaxue.com/zuihaodaxuepaiming2019.html"
    html=getHTMLtEXT(url)
    fillUnivList(uinfo,html)
    PrintUnivlist(uinfo,20)
main()


存入数据库后：