BeautifulSoup Spreadsheet

BeautifulSoup.md

Introduction to Beautiful Soup

Beautiful Soup is a popular Python library used for parsing HTML and XML documents. It provides a simple and intuitive interface to extract data from web pages or analyze structured markup data.

With Beautiful Soup, you can navigate and search through the parse tree, extract desired information, and even modify the content of the document. Whether you are scraping data from websites, parsing XML files, or working with HTML documents, Beautiful Soup can greatly simplify the process.

One of the key features of Beautiful Soup is its ability to handle poorly formatted or invalid markup. It is designed to be resilient and flexible, allowing you to work with imperfect HTML or XML and still extract the data you need.

The official Beautiful Soup documentation.

Spreadsheet

Topic	Description
Name	Beautiful Soup
Purpose	Python library for parsing HTML and XML documents
Features	- Navigating parse trees - Searching the parse tree - Modifying the parse tree - Extracting data from HTML/XML documents
Installation	pip install beautifulsoup4
Import Statement	from bs4 import BeautifulSoup
Initialization	soup = BeautifulSoup(html_doc, 'html.parser')
Basic Operations	- Searching by tag names - Searching by CSS class or ID - Searching by attribute values
Extracting Data	- Accessing tag contents - Accessing tag attributes - Extracting text from tags
Modifying Content	- Modifying tag names - Modifying tag attributes - Modifying tag contents
Parsing Options	- HTML parser options ('html.parser', 'lxml', 'html5lib', etc.)
Error Handling	Beautiful Soup handles malformed HTML/XML gracefully and tries to make sense of it
Examples	- Scraping website data - Extracting information from XML files - Parsing and manipulating HTML documents

Basic Operations:

Operation	Command/Function	Example
Searching by tag names	find_all(name)	soup.find_all('a') retorna uma lista de todas as tags <a> no documento analisado
Searching by CSS class or ID	find_all(attrs={'class': 'nome_da_classe'}) ou find_all(id='valor_do_id')	soup.find_all(attrs={'class': 'titulo'}) retorna tags com class="titulo"
Searching by attribute values	find_all(attrs={'atributo': 'valor'})	soup.find_all(attrs={'data-type': 'imagem'}) retorna tags com data-type="imagem"

Extracting Data:

Operation	Command/Function	Example
Accessing tag contents	.contents ou .text	tag.contents retorna os filhos diretos da tag tag.text retorna o texto dentro da tag
Accessing tag attributes	.get('atributo') ou .attrs['atributo']	tag.get('href') retorna o valor do atributo href da tag
Extracting text from tags	.get_text() ou .text	tag.get_text() retorna o texto combinado dentro da tag e seus descendentes

Modifying Content:

Operation	Command/Function	Example
Modifying tag names	.name = 'novo_nome'	tag.name = 'h2' altera o nome da tag para <h2>
Modifying tag attributes	.attrs['atributo'] = 'novo_valor'	tag.attrs['class'] = 'destaque' altera o valor do atributo class da tag
Modifying tag contents	.string = 'novo_conteudo'	tag.string = 'Olá, Mundo!' altera o conteúdo de texto da tag para 'Olá, Mundo!'

Parsing Options:

Option	Command/Function	Example
HTML parser options	Especificar o parser ao inicializar o Beautiful Soup	soup = BeautifulSoup(html_doc, 'lxml') inicializa o Beautiful Soup com o parser 'lxml'

Error Handling:

Feature	Command/Function	Example
Graceful error handling	O Beautiful Soup trata HTML/XML malformados de forma adequada	soup = BeautifulSoup(html_malformado, 'html.parser') trata HTML malformado durante o parsing