代码运行出现IndexError: list index out of range

import requests
from bs4 import BeautifulSoup

allUniv = []
def getHTMLText(url):
    try:
        r = requests.get(url, timeout=30)
        r.raise_for_status()
        r.encoding = 'utf-8'
        return r.text
    except:
        return ""

def fillUnivList(soup):
    data = soup.find_all('tr')
    for tr in data:
        ltd = tr.find_all('td')
        if len(ltd)==0:
            continue
        singleUniv = []
        for td in ltd:
            singleUniv.append(td.string)
        allUniv.append(singleUniv)

def printUnivList(num):
    print("{:4}{:10}{:5}{:8}{:10}".format("排名","学校名称","省市","学校类型","总分"))
    for i in range(num):
        u=allUniv[i]
        print("{:4}{:10}{:5}{:8}{:10}".format(u[0],u[1],u[2],u[3],u[4]))

def main():
    url = 'http://www.zuihaodaxue.cn/zuihaodaxuepaiming2020.html'
    html = getHTMLText(url)
    soup = BeautifulSoup(html, "html.parser")
    fillUnivList(soup)
    printUnivList(100)
main()

源代码是这样，怎么解决呀0.0

IndexError: list index out of range
数组越界异常了，看下具体报错的代码行，是不是使用了超过列表最大的索引。

你这个http://www.zuihaodaxue.cn/zuihaodaxuepaiming2020.html 地址是 404 错误，地址不存在

getHTMLText(url):函数返回的是except:中return ""

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