html2obsidian

Introduction

This lib (a simple __main__ interface attached) converts an HTML to Obsidian-style Markdown.

Features

Supported tags: <hr>, <p>, <h1>, <h2>, <h3>, <h4>, <h5>, <h6>, <ul>, <ol>, <li>, <a>, <blockquote>, <table>, <tr>, <th>, <td>, <img>, <b>, <strong>, <i>, <em>, <mark>, <del>, <s>, <sub>, <sup>, <pre>, <div> (partial), <code>, <samp>, <kbd>, <span> (partial)
Math style support: $...$ , \(...\), $$...$$, \[...\], and MathML
Within-document link support
Within-site hyperlink/image support

Installation

This library requires python>=3.6.

To install dependencies (please refer to requirements.txt for detail), in particular, MathML is supported only when lxml is installed.

pip install -r requirements.txt

or

conda install pytest lxml

Usage

Run as executable

To use the attached __main__, refer to

python3 convert_html.py --help

for help. Note that sometimes there are warnings issued, e.g.

/path/to/convert_html.py:1183: UserWarning: illegal linebreaks in <a>; ignored
  warnings.warn('illegal linebreaks in <a>; ignored')

Most of the time, however, it does not imply errors in conversion.

Use the library

from lxml import etree
import convert_html

html_file = ...
options = ...  # may be empty dict
url = ...  # may be None

with open(html_file, encoding='utf-8') as infile:
    html = infile.read()
parser = etree.HTMLParser(target=convert_html.KeepOnlySupportedTarget(strict=True))
elements = etree.HTML(html, parser)
# this is the string output containing the markdown
output = convert_html.StackMarkdownGenerator(options, elements, url)

Please refer to convert_html.StackMarkdownGenerator.default_options for help on available options.

Run tests

To run the tests, simply

pytest

Note that sometimes there are warnings issued, like mentioned above. Please refer to test_convert_html.py (in particular, the comments), to see whether such warnings imply error or not.

Bugs

$$..$$-style math is not recognized when embedded in <p> rather than in <div class="math">.

License

kkew3/html2obsidian

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