本篇爬虫主要是为了从最好大学网站上爬取2019年各个大学的排名，以及把数据存储到mysql的过程：
1 import requests 2 from bs4 import BeautifulSoup 3 import bs4 4 import pymysql 5 6 # 连接数据库并且创建数据表 7 db = pymysql.connect('localhost','root','password','universityrankings') 8 cursor = db.cursor() 9 cursor.execute('drop table if exists UNRANKING2019') 10 sql = """ 11 create table UNRANKING2019 12 ( 13 paiming INTEGER, 14 xuexiaomingchen VARCHAR(40), 15 shengshi VARCHAR(40), 16 zongfen VARCHAR(40), 17 shengyuanzhiliang VARCHAR(40), 18 peiyangjieguo VARCHAR(40), 19 shehuishengyu VARCHAR(40), 20 keyanguimo VARCHAR(40), 21 keyanzhiliang VARCHAR(40), 22 dingjianchengguo VARCHAR(40), 23 dingjianrencai VARCHAR(40), 24 kejifuwu VARCHAR(40), 25 chengguozhuanhua VARCHAR(40), 26 xueshengguojihua VARCHAR(40), 27 primary key(xuexiaomingchen) 28 ); 29 """ 30 cursor.execute(sql) 31 32 def getHTMLText(url): 33 try: 34 r = requests.get(url,timeout = 30) 35 r.raise_for_status() 36 r.encoding = r.apparent_encoding 37 return r.text 38 except: 39 return "" 40 41 def fillUnivlist(ulist,html): 42 soup = BeautifulSoup(html,"html.parser") 43 for tr in soup.find('tbody').children: 44 if isinstance(tr, bs4.element.Tag): 45 tds = tr.find_all('td') 46 ulist.append([tds[0].string,tds[1].string,tds[2].string,tds[3].string,tds[4].string,tds[5].string,tds[6].string,tds[7].string,tds[8].string,tds[9].string,tds[10].string,tds[11].string,tds[12].string,tds[13].string]) 47 sql = """ 48 INSERT INTO universityrankings.unranking2019 values(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s) 49 """ 50 for i in range(len(ulist)): 51 cursor.execute(sql,ulist[i]) 52 db.commit() 53 cursor.close() 54 55 def printUnivList(ulist,num): 56 tplt = "{0}\t{1}\t{2}\t{3}\t{4}\t{5}\t{6}\t{7}\t{8}\t{9}\t{10}\t{11}\t{12}\t{13}" 57 print(tplt.format("排名","学校名称","省市","总分","生源质量","培养结果","社会声誉","科研规模","科研质量","顶尖成果","顶尖人才","科技服务","成果转化","学生国际化")) 58 for i in range(num): 59 u = ulist[i] 60 print(tplt.format(u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7],u[8],u[9],u[10],u[11],u[12],u[13])) 61 62 def main(): 63 uinfo = [] 64 url = 'http://www.zuihaodaxue.com/zuihaodaxuepaiming2019.html' 65 html = getHTMLText(url) 66 fillUnivlist(uinfo,html) 67 printUnivList(uinfo,20) 68 main()