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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> 本文标题:Python常用爬虫代码总结方便查询-创新互联 <br> 网址分享:<a href="http://cxhlcq.com/article/hoihh.html">http://cxhlcq.com/article/hoihh.html</a> </div> </div> </div> <div class="other container"> <h3>其他资讯</h3> <ul> <li> <a href="/article/gcopcp.html">PHP教程,Linux教程光盘</a> </li><li> <a href="/article/gcohgo.html">Kafka中如何删除topic</a> </li><li> <a href="/article/gcohip.html">js中caller指的是什么意思</a> </li><li> <a href="/article/gcohie.html">基于form-data请求格式详解</a> </li><li> <a href="/article/gcohsp.html">python中迭代器与生成器有什么作用</a> </li> </ul> </div> <div class="footer"> <div class="foota container"> <div class="foot_nav fl col-lg-8 col-md-8 col-sm-12 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