python3大学排名，输出问题！

问题遇到的现象和发生背景

输出问题main（）里写几就输出第几个多少次，例如main（7）就是排名第七的7次！

问题相关代码，请勿粘贴截图

``````#e24.1CrawUnivRanking.py
import requests
import bs4
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.text.strip())
        allUniv.append(singleUniv)
def printUnivList(num):
    print("{:^4}{:^10}{:^5}{:^8}{:^10}".format
    ("排名","学校名称","省市","总分","办学层次"))
    for i in range(num):
         u = allUniv[i]
    for i in range(num):
        if i is None:
         i = 0
        print("{:^4}{:^10}{:^5}{:^8}{:^10}".format
        (u[0],u[1],u[2],u[4],u[5]))
def main(num):
    url = "https://www.shanghairanking.cn/rankings/bcur/2022"
    html = getHTMLTEXT(url)
    soup = BeautifulSoup(html,"html.parser")
    fillUnivList(soup)
    printUnivList(num)
main(5) 

运行结果及报错内容

排名 学校名称 省市 总分 办学层次
5 复旦大学 Fudan University 双一流/985/211 上海 697.8 35.9
5 复旦大学 Fudan University 双一流/985/211 上海 697.8 35.9
5 复旦大学 Fudan University 双一流/985/211 上海 697.8 35.9
5 复旦大学 Fudan University 双一流/985/211 上海 697.8 35.9
5 复旦大学 Fudan University 双一流/985/211 上海 697.8 35.9

我想要达到的结果

想要正常输出

def printUnivList(num):
    print("{:^4}{:^10}{:^5}{:^8}{:^10}".format
              ("排名","学校名称","省市","总分","办学层次"))
    for i in range(num):
        u = allUniv[i]      # 这里报错list index out of range。    
        print("{:^4}{:^10}{:^5}{:^8}{:^10}".format
              (u[0],u[1],u[2],u[4],u[5]))

改成

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