Python HTML/XML parser
Beautiful Soup is a Python package for parsing HTML and XML documents, including those with malformed markup. It creates a parse tree for documents that can be used to extract data from HTML, which is useful for web scraping.
History.
Beautiful Soup was started in 2004 by Leonard Richardson. It takes its name from the poem "Beautiful Soup" from Alice's Adventures in Wonderland and is a reference to the term "tag soup" meaning poorly-structured HTML code. Richardson continues to contribute to the project, which is additionally supported by paid open-source maintainers from the company Tidelift.
Versions.
Beautiful Soup 3 was the official release line of Beautiful Soup from May 2006 to March 2012. The current release is Beautiful Soup 4.x.
In 2021, Python 2.7 support was retired and the release 4.9.3 was the last to support Python 2.7.
Usage.
Beautiful Soup represents parsed data as a tree which can be searched and iterated over with ordinary Python loops. 
Code example.
The example below uses the Python standard library's urllib to load Wikipedia's main page, then uses Beautiful Soup to parse the document and search for all links within. 
from bs4 import BeautifulSoup
from urllib.request import urlopen
with urlopen('[URL] as response:
 soup = BeautifulSoup(response, 'html.parser')
 for anchor in soup.find_all('a'):
 print(anchor.get('href', '/'))
Another example is using the Python requests library to get divs on a URL.
import requests
from bs4 import BeautifulSoup
url = '[URL]
response = requests.get(url)
soup = BeautifulSoup(response.text, 'html.parser')
headings = soup.find_all('div')
for heading in headings:
 print(heading.text.strip())
References.
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