python_轻量级爬虫开发4

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# coding:utf8from bs4 import BeautifulSoupimport rehtml_doc = """<html><head><title>The Dormouse's story</title></head><body><p class="title"><b>The Dormouse's story</b></p><p class="story">Once upon a time there were three little sisters; and their names were<a href="http://example.com/elsie" class="sister" id="link1">Elsie</a>,<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;and they lived at the bottom of a well.</p><p class="story">...</p>"""soup = BeautifulSoup(html_doc,'html.parser',from_encoding='utf-8')print u'获取所有的链接'links = soup.find_all('a')for link in links:    print link.name,link['href'],link.get_text()print u'获取Lacie的链接'link_node = soup.find('a',href='http://example.com/lacie')print link_node.name,link_node['href'],link_node.get_text()print u'正则匹配'link_node = soup.find('a',href=re.compile(r"ill"))print link_node.name,link_node['href'],link_node.get_text()print u'获取P段落文字'p_node = soup.find('p',class_="title")print p_node.name,p_node.get_text()

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