爬蟲入門,中國大學排名
阿新 • • 發佈:2018-12-22
此爬蟲本人初學所寫,僅能實現較少功能
ps:需要使用到beautifulsoup, requests庫
安裝方法:pip install beautifulsoup4
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') ulist.append([tds[0].string, tds[1].string, tds[3].string]) pass def printUnivList(ulist, num): tplt = "{0:^10}\t{1:{3}^10}\t{2:^10}" print(tplt.format("排名","學校名稱","總分",chr(12288))) for i in range(num): u = ulist[i] print(tplt.format(u[0], u[1], u[2],chr(12288))) def main(): uninfo =[] url = 'http://www.zuihaodaxue.cn/zuihaodaxuepaiming2018.html' html = getHTmLText(url) fillUnivList(uninfo, html) printUnivList(uninfo, 100) main()
列印時使用了chr(12288)進行了中文對齊,美觀一些