用python爬取中国大学排名网站排名信息

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程序解决问题如下:

利用python网络爬虫爬取中国大学排名网站上的排名信息，将排名前20的大学的信息保存为文本文件，并在窗口打印出这20所大学的信息，按列打印和保存。

程序代码如下：

import requests from bs4 import BeautifulSoup import bs4 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') hdfd = tds[0].find('div') tt = hdfd.string.split() ff = "".join(tt) attr = tds[1].find('a') hh = tds[4].string.split() hg = "".join(hh) shf=tds[2].text.split() shfn="".join(shf) ulist.append([ff, attr.string,shfn,hg]) def printUnivList(ulist, num): tplt = "{0:^10}\t{1:{4}^10}\t{2:^10}\t{3:^10}" print(tplt.format("排名","学校名称","省份","总分", chr(12288))) with open('save.txt', 'w+', encoding='utf-8') as f: f.write(tplt.format("排名","学校名称","省份","总分", chr(12288))) f.write('\n') for i in range(num): u = ulist[i] print(tplt.format(u[0], u[1], u[2],u[3],chr(12288))) with open('save.txt', 'a', encoding='utf-8') as f: f.write(tplt.format(u[0], u[1], u[2],u[3],chr(12288))) f.write('\n') def main(): with open('save.txt', 'w+', encoding='utf-8') as f: f.write("排名,学校,省份,总分\n") f.close() uinfo = [] url = 'https://www.shanghairanking.cn/rankings/bcur/2021' html = getHTMLText(url) fillUnivList(uinfo, html) printUnivList(uinfo, 20) main()

程序运行结果如下：