python爬取大学排名

来自北理嵩老师的案例，之前嵩老师的网址我没办法访问，新的网址爬虫不成功，所以改了一下。
import requests
from bs4 import BeautifulSoup
import bs4

#通过URL信息从网页爬取数据
def getHTMLText(url):
    try:
        r = requests.get(url,timeout = 30)
        r.raise_for_status()
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return ""

#提取页面中的关键数据，并且添加至列表
def fillUnivList(ulist,html):
    new_html = (html.replace('<!---->', '')).replace('
', '')
    soup = BeautifulSoup(new_html,'html.parser')
    #遍历tbody标签的所有子类型
    for tr in soup.find('tbody').children:
        #检测tr标签的类型，如果tr类型不是bs4库类型，则过滤掉
        if isinstance(tr,bs4.element.Tag):
            tds = tr('td')
            astr = tds[1].find('a')
            #print(tds[0].string)
            #把需要的td内容加到list中
            ulist.append([tds[0].string,astr.string,tds[4].string])

#格式化输出
def printUnivList(ulist,num):
    tplt = "{0:^10}	{1:{3}^10}	{2:^10}"
    #输出表头
    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].strip(),u[1].strip(),u[2].strip(),chr(12288)))

def main():
    uinfo = []
    #url = 'http://m.gaosan.com/gaokao/265440.html'
    url = 'https://www.shanghairanking.cn/rankings/bcur/2020'
    html = getHTMLText(url)
    fillUnivList(uinfo,html)
    printUnivList(uinfo,20) #20 unive

main()