本文实例讲述了Python获取当前页面内所有链接的四种方法。分享给大家供大家参考,具体如下:
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''' 得到当前页面所有连接 ''' import requests import re from bs4 import BeautifulSoup from lxml import etree from selenium import webdriver url = 'http://www.testweb.com' r = requests.get(url) r.encoding = 'gb2312' # 利用 re (太黄太暴力!) matchs = re.findall(r "(?<=href=\").+?(?=\")|(?<=href=\').+?(?=\')" , r.text) for link in matchs: print (link) print () # 利用 BeautifulSoup4 (DOM树) soup = BeautifulSoup(r.text, 'lxml' ) for a in soup.find_all( 'a' ): link = a[ 'href' ] print (link) print () # 利用 lxml.etree (XPath) tree = etree.HTML(r.text) for link in tree.xpath( "//@href" ): print (link) print () # 利用selenium(要开浏览器!) driver = webdriver.Firefox() driver.get(url) for link in driver.find_elements_by_tag_name( "a" ): print (link.get_attribute( "href" )) driver.close() |
注意:若页面中含有 iframe,则 iframe 内所包含页面的所有标签都无法用以上四种方法获得!!!此时则要:
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# 再打开所有iframe查找全部的a标签 for iframe in soup.find_all( 'iframe' ): url_ifr = iframe[ 'src' ] # 取得当前iframe的src属性值 rr = requests.get(url_ifr) rr.encoding = 'gb2312' soup_ifr = BeautifulSoup(rr.text, 'lxml' ) for a in soup_ifr.find_all( 'a' ): link = a[ 'href' ] m = re.match(r 'http:\/\/.*?(?=\/)' ,link) #print(link) if m: all_urls.add(m.group( 0 )) |
希望本文所述对大家Python程序设计有所帮助。
原文链接:http://www.cnblogs.com/hhh5460/p/5044038.html