Use Python's BeautifulSoup library to load HTML messages
Parsing HTML documents is a very common task in fields such as data mining and web crawling. However, the structure of HTML documents is complex and varied, requiring some tools to extract data quickly and accurately. One of the more popular tools is Python's BeautifulSoup library.
BeautifulSoup is a powerful Python library, which can automatically convert the encoding of the input document and convert it to Unicode encoding, which is convenient for processing Chinese characters. At the same time, it has a powerful parsing function, which can parse HTML and XML documents, and supports CSS selectors and XPath expressions. Therefore, using the BeautifulSoup library can easily extract the required information from HTML documents.
Before using the BeautifulSoup library, it needs to be installed first. Enter the following command in the terminal to install:
pip install beautifulsoup4
Next, let's look at a concrete example. Suppose we have an HTML file (test.html) with the following content:
<!DOCTYPE html>
<html>