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Python常用爬虫代码总结方便查询-创新互联

beautifulsoup解析页面

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from bs4 import BeautifulSoup
soup = BeautifulSoup(htmltxt, "lxml")
# 三种装载器
soup = BeautifulSoup("

", "html.parser") ### 只有起始标签的会自动补全,只有结束标签的会自动忽略 ### 结果为:
soup = BeautifulSoup("

", "lxml") ### 结果为:
soup = BeautifulSoup("

", "html5lib") ### html5lib则出现一般的标签都会自动补全 ### 结果为:

# 根据标签名、id、class、属性等查找标签 ### 根据class、id、以及属性alog-action的值和标签类别查询 soup.find("a",class_="title",id="t1",attrs={"alog-action": "qb-ask-uname"})) ### 查询标签内某属性的值 pubtime = soup.find("meta",attrs={"itemprop":"datePublished"}).attrs['content'] ### 获取所有class为title的标签 for i in soup.find_all(class_="title"): print(i.get_text()) ### 获取特定数量的class为title的标签 for i in soup.find_all(class_="title",limit = 2): print(i.get_text()) ### 获取文本内容时可以指定不同标签之间的分隔符,也可以选择是否去掉前后的空白。 soup = BeautifulSoup('

The Dormouses story

The Dormouses story

', "html5lib") soup.find(class_="title").get_text("|", strip=True) #结果为:The Dormouses story|The Dormouses story ### 获取class为title的p标签的id soup.find(class_="title").get("id") ### 对class名称正则: soup.find_all(class_=re.compile("tit")) ### recursive参数,recursive=False时,只find当前标签的第一级子标签的数据 soup = BeautifulSoup('abc','lxml') soup.html.find_all("title", recursive=False)</pre> <br> 本文名称:Python常用爬虫代码总结方便查询-创新互联 <br> 网页网址:<a href="http://www.kswsj.com/article/hoihh.html">http://www.kswsj.com/article/hoihh.html</a> </div> </div> <div class="other"> <h3>其他资讯</h3> <ul> <li> <a href="/article/jipcgj.html">php去除末尾字符串的方法</a> </li><li> <a href="/article/jipcpp.html">如何用php删除目录里的所有文件</a> </li><li> <a href="/article/jipsdo.html">js自定义trim函数如何实现删除两端空格功能</a> </li><li> <a href="/article/jipchi.html">Python怎么实现分类保存所有文章图片</a> </li><li> <a href="/article/jipsod.html">HadoopYARN配置参数剖析</a> </li> </ul> </div> </div> <!-- end #bd --> <div class="c"></div> <!-- begin #fd --> <div id="fd" class="index-fd pr"> <div 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