Python's html2text: Convert HTML to Markdown Document Example Detailed Explanation

In the fields of web development, data analysis, web crawler, etc., we often encounter situations where HTML documents need to be processed. But for the need to convert HTML to Markdown format, some specific tools and techniques are required. This article will introduce in detail how to use the html2text module in the Python library to convert HTML to Markdown, and provide detailed examples.

1. Install the html2text module
To use Python to convert HTML to Markdown, you first need to install the html2text module. It can be installed with the following command:

pip install html2text

2. Import the necessary modules
Before you start using html2text, you need to import the necessary modules. Here is sample code to import the required modules:

import html2text

3. HTML to Markdown conversion
The html2text module provides a function called html2text, which can convert HTML into Markdown formatted text. Here is an example:

html = "<h1>Hello, World!</h1><p>This is an example.</p>"
markdown = html2text.html2text(html)
print(markdown)

output:

Hello, World!
=============

This is an example.

As shown above, the html2text function converts heading tags in HTML to heading syntax in Markdown, and paragraph tags to normal text.

4. Custom conversion options
html2text also provides some customizable options to convert according to your needs. Here are some commonly used options:

bodywidth: Specifies the maximum width of each line of text output.
wrap_links: Determines whether to add square brackets around links.
skip_internal_links: Determines whether to skip internal links.

These options can be set by passing keyword arguments in the html2text function. For example:

markdown = html2text.html2text(html, bodywidth=80, wrap_links=True, skip_internal_links=False)

The above code will set the maximum line width to 80, add square brackets to links, and not skip internal links.

5. Processing hyperlinks and pictures
When converting HTML to Markdown format, you often encounter the need to process hyperlinks and pictures. The html2text module also provides a corresponding solution.

5.1 Hyperlink
You can customize the display text of the link by setting the aliases property. For example:

html = '<a href="https://www.example.com">Visit our website</a>'
h = html2text.HTML2Text()
h.aliases.update({"https://www.example.com": "Example Website"})
markdown = h.handle(html)
print(markdown)

The above code will display as a hyperlink in Markdown format, and display the linked website as custom text.

5.2 Image
The html2text module also supports converting images in HTML to Markdown format. For example:

html = '<img src="image.jpg" alt="Example Image">'
markdown = html2text.html2text(html)
print(markdown)

The above code will display images in Markdown format and display image files as custom text.

Summary:
This article details how to use the html2text module in Python to convert HTML to Markdown formatted documents. We can easily achieve this by installing the html2text module, importing the necessary modules, using the html2text functions, and customizing the conversion options. At the same time, we also learned how to handle the conversion of hyperlinks and images. Hope this article helps you deal with your HTML document conversion needs.

Python's html2text: Convert HTML to Markdown Document Example Detailed Explanation

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