Python development "modules": BeautifulSoup

BeautifulSoup

BeautifulSoup is a module that receives an HTML or XML string, then formats it, and then passes through the method he provides to quickly find the specified element, making it easier to find the specified element in HTML or XML

1. Installation:

PIP3 Install Beautifulsoup4pip install  lxml   # python2.x

2, simple use:

From BS4 Import Beautifulsouphtml_doc = "" "
3. Labeling Method:
① name tag names
# nametag = Soup.find (' A ') # <a class= "Sister0" id= "link1" >els<span>f</span>ie</a>name = Tag.name # Get Print (name)  # atag.name = ' span ' # setting replaces the first a label for span label print (soup)
② attrs Tag Properties
# Attrstag = Soup.find (' A ') # <a class= "Sister0" id= "link1" >els<span>f</span>ie</a>attrs = Tag.attrs          # Get Print (attrs) # {' Class ': [' Sister0 '], ' id ': ' link1 '}tag.attrs = {' IK ': 123}     # Set property tag.attrs[' id '] = ' IIIII ' # change idprint (soup)
③ children All Child Tags
# child tag, just get son tag = soup.find (' A ') # <a class= "Sister0" id= "link1" >els<span>f</span>ie</a>v = Tag.childrenprint (v) # <list_iterator object at 0x02e71230>for i in V:    print (i) # els# <span>f</span ># IE
④ descendants descendants label
# get Descendants BODY = soup.find (' body ') v = body.descendantsprint (v) for I in V:    print (i)
⑤ Clear clears all the label's child labels (retains the signature)　
# clear Tab Contents tag = soup.find (' body ') tag.clear () print (soup) # 
⑥ decompose, remove all tags recursively
# recursive removal of all tags BODY = soup.find (' body ') Body.decompose () print (soup) # 
⑦ Extract Remove all tags recursively and get deleted tags
# recursively Delete all tags and get deleted tags BODY = soup.find (' body ') v = body.extract () print (soup) # 
　　
　
Python development "modules": BeautifulSoup