BeautifulSoup

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# -*- coding:utf-8 -*-# pip install beautifulsoup4 安装from 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')#soup = BeautifulSoup(html_doc,'xml')# 打印 title标签和标签内的内容print(soup.title)# 打印title标签名print(soup.title.name)# 打印title标签里面的内容print(soup.title.string)# 打印title父标签的标签名print(soup.title.parent.name)# 打印p标签名和标签内容print(soup.p)# 打印第一个p标签的class属性值print(soup.p['class'])#　打印ａ标签和标签内容print(soup.a)# 打印查询到的所有ｐ标签和标签内容print(soup.find_all('p'))# 打印 id属性是link3的标签和内容print(soup.find(id='link3'))for link in soup.find_all('a'):    # 打印 a标签 href 属性值 http://example.com/...    print(link.get('href'))print('-'*50)# 打印文档除了标签之外的所有内容print(soup.get_text())print('-'*50)# 打印文档除了标签之外的所有内容print(soup.text)print('*'*50)# 正则匹配查找含有b的标签# body# bfor tag in soup.find_all(re.compile('b')):    print(tag.name)print('*'*50)# 查找所有a标签和b标签print(soup.find_all(['a','b']))print('*'*50)# 查找a标签 并且class属性为 sisterprint(soup.find_all("a", attrs={"class": "sister"}))# 查找a标签并且 值为Elsize print(soup.find_all("a", text="Elsie"))
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