pyxy

HTML in Python

work-in-progress
contributions appreciated

---

pyxy lets you put HTML directly in Python code. You can think of it as JSX for Python. It builds on the fantastic work of pyxl, which is a similar project predating JSX. Compared to pyxl, it takes a new approach that makes other tools do most of the work:

• parso provides the tokenization and parsing, using a custom grammar to enable handling XML
• htpy is used to rebuild markup

Here's a minimal example:

def is_logged_in() -> bool:
    return False

animal_images = ["cat.png", "dog.png", "cow.png"]
status_image = "logged-in.png" if is_logged_in() else "logged-out.png"

def demo():
    return (
        <div>
            <img src={status_image} />
            <ul>
                { <li><img src={image_file} /></li> for image_file in animal_images }
            </ul>
        </div>
    )

print(demo())

<div><img src="logged-out.png"><ul><li><img src="cat.png"></li><li><img src="dog.png"></li><li><img src="cow.png"></li></ul></div>

IDE Support

• PyCharm Plugin
• Sublime Text syntax highlighting
• VSCode - not yet supported, see #10

Tool support

• ruff - partial support, see #8
• mypy - not yet supported, see #9
• pyright - not yet supported, see #11
• black - not yet supported, see #7

See also

HTML-in-Python Implementations

• dropbox/pyxl - The original
• gvanrossum/pyxl3 - Python 3 support
• pyxl4/pyxl4 - A fork created when pyxl3 was no longer maintained
• twidi/mixt - Another fork of Pyxl with a lot of features
• michaeljones/packed - A unique effort that uses decorators and a compilation step
• pelme/htpy - Not HTML-in-Python, but close. A great solution to generating HTML with Python
• RudreshVeerkhare/ReactPy - Another implementation of HTML in Python

Using tagged strings

• rmorshea/tagstr
• jviide/htm.py
• treykeown/taglit

Syntax Support

• christoffer/pycharm-pyxl - Pyxl support for PyCharm
• yyjhao/sublime-pyxl - Pyxl syntax highlighting for Sublime Text

HTML-in-* Implementations

• ECMAScript 4 XML (E4X) - The oldest example I can find of XML being embedded in another language (2004!)
• JSX - A document detailing the motivations for JSX over other alternatives
• gox - HTML in Go
• templ - HTML in Go (but templates?)
• rsx - HTML in Rust
• syn-rsx - HTML in Rust
• rstml - HTML in Rust
• LuaX - HTML in Lua
• gccx - HTML in C++
• rux - HTML in Ruby
• php