html_doc = ''' <html><head><title>The Dormouse's story</title></head> <body> <p class="sister"><b>$37</b></p> <p class="story" id="p">Once upon a time there were three little sisters; and their names were <a href="http://example.com/elsie" class="sister" >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> ''' from bs4 import BeautifulSoup soup = BeautifulSoup(html_doc,'lxml') print(soup) print(type(soup)) # 遍历文档树 # *****1、直接使用 print(soup.html) print(type(soup.html)) print(soup.a) print(soup.p) # *****2、获取标签的名称 print(soup.a.name) # *****3、获取标签的属性 print(soup.a.attrs) # 获取a标签中所有属性 print(soup.a.attrs['href']) # ***** 4、获取标签的文本内容 print(soup.p.text) # 5、嵌套选择 print(soup.html.body.p) # 6、子节点、子孙节点 print(soup.p.children) # 返回迭代器对象 print(list(soup.p.children)) # 7、父节点、祖先节点 print(soup.b.parent) print(soup.b.parents) print(list(soup.b.parents)) # 8、兄弟节点(sibling:兄弟姐妹) print(soup.a) # 获取下一个兄弟节点 print(soup.a.next_sibling) # 获取下一个的所有兄弟节点,返回的是一个生成器 print(soup.a.next_siblings) print(list(soup.a.next_siblings)) # 获取上一个兄弟节点 print(soup.a.previous_sibling) # 获取上一个的所有兄弟节点，返回的是一个生成器 print(list(soup.a.previous_siblings))