HTML paragraphs are automatically indented by two spaces
The method to use Python and BeautifulSoup to parse HTML documents is as follows: load the HTML document and create a BeautifulSoup object. Use BeautifulSoup objects to find and process tag elements, such as: Find a specific tag: soup.find(tag_name) Find all specific tags: soup.find_all(tag_name) Find tags with specific attributes: soup.find(tag_name, {'attribute': 'value'}) extracts the text content or attribute value of the label. Adjust the code as needed to obtain specific information.
Parsing HTML documents using Python and BeautifulSoup
Objective:
Learn how to parse HTML documents using Python and the BeautifulSoup library.
Required knowledge:
- Python basics
- HTML and XML knowledge
##Code :
from bs4 import BeautifulSoup
# 加载 HTML 文档
html_doc = """
<html>
<head>
<title>HTML 文档</title>
</head>
<body>
<h1>标题</h1>
<p>段落</p>
</body>
</html>
"""
# 创建 BeautifulSoup 对象
soup = BeautifulSoup(html_doc, 'html.parser')
# 获取标题标签
title_tag = soup.find('title')
print(title_tag.text) # 输出：HTML 文档
# 获取所有段落标签
paragraph_tags = soup.find_all('p')
for paragraph in paragraph_tags:
print(paragraph.text) # 输出：段落
# 获取特定属性的值
link_tag = soup.find('link', {'rel': 'stylesheet'})
print(link_tag['href']) # 输出：样式表链接 Practical case: A simple practical case is a crawler that uses BeautifulSoup to extract specified information from a web page. For example, you can use the following code to pull questions and answers from Stack Overflow:
import requests
from bs4 import BeautifulSoup
url = 'https://stackoverflow.com/questions/31207139/using-beautifulsoup-to-extract-specific-attribute'
response = requests.get(url)
soup = BeautifulSoup(response.text, 'html.parser')
questions = soup.find_all('div', {'class': 'question-summary'})
for question in questions:
question_title = question.find('a', {'class': 'question-hyperlink'}).text
question_body = question.find('div', {'class': 'question-snippet'}).text
print(f'问题标题：{question_title}')
print(f'问题内容：{question_body}')
print('---')The above is the detailed content of HTML paragraphs are automatically indented by two spaces. For more information, please follow other related articles on the PHP Chinese website!
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