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beautifulsoup4库安装、使用

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(venv) D:\pytest>pip install beautifulsoup
Collecting beautifulsoup
  Using cached https://files.pythonhosted.org/packages/1e/ee/295988deca1a5a7accd783d0dfe14524867e31abb05b6c0eeceee49c759d/BeautifulSoup-3.2.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\1\AppData\Local\Temp\pip-install-mav7d0bo\beautifulsoup\setup.py", line 22
        print "Unit tests have failed!"
                                      ^
    SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Unit tests have failed!")?

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\1\AppData\Local\Temp\pip-install-mav7d0bo\beautifulsoup\

 

哦,大概是beautifulsoup已经被炸了,需要pip install beautifulsoup4 或者直接bs4

 


 

BeautifulSoup类的基本元素

基本元素 说明
Tag 标签,最基本的信息组织单元,分别用<>  和</>标明开头和结尾
Name 标签的名字,<p>…</p>的名字是'p',格式:<tag>.name
Attributes 标签的属性,字典形式组织,格式:<tag>.attrs
NavigableString 标签内非属性字符串,<>…</>中字符串,格式:<tag>.string
Comment 标签内字符串的注释部分,一种特殊的Comment类型

 


 

 

标签树的下行遍历

属性 说明
.contents 子节点的列表,将<tag>所有儿子节点存入列表
.children 子节点的迭代类型,与.contents类似,用于循环遍历儿子节点
.descendants 子孙节点的迭代类型,包含所有子孙节点,用于循环遍历




标签:标签,beautifulsoup,failed,install,使用,pip,beautifulsoup4,安装,节点
来源: https://www.cnblogs.com/p36606jp/p/15113887.html