定向网页爬取

#coding=utf-8import requestsfrom bs4 import BeautifulSoupimport bs4import sysreload(sys)sys.setdefaultencoding( "utf-8" )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):    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])def printUnivList(ulist, num):    tplt = "{0:^10}\t{1:{3}^10}\t{2:^10}"    print(tplt.format("排名", "学校名称", "总分", chr(12288)))    for i in range(num):        u = ulist[i]        print(tplt.format(u[0], u[1], u[2], chr(12288)))def main():    uinfo = []    url = 'http://www.zuihaodaxue.cn/zuihaodaxuepaiming2016.html'    html = getHTMLText(url)    fillUnivList(uinfo, html)    printUnivList(uinfo, 20)  # 20 univsmain()