[IntelliSense] Consider adding Python support

[davepeck]

Aware of the limitations of older template engines like Jinja2 and Django templates, the Python web community is increasingly reaching for libraries like htpy, htmy, and domonic, as well as frameworks like FastHTML for HTML "templating" in Python itself.

The tailwind vscode plugin doesn't quite work today for Python. For instance, consider this hack-ish configuration:

{
    "tailwindCSS.includeLanguages": {
        "python": "html"
    },
    "tailwindCSS.classAttributes": [
        "class_"
    ]
}

Using htpy as an example, simple lines like this get intellisense:

import htpy as h

def avatar(user: User) -> h.Renderable:
    # tailwind plugin works fine here; colors are displayed, hovering over classes works, etc.
    return h.div(class_="font-bold text-blue-700")[user.name]  

But class_ in this case can also coalesce multiple values; here, the plugin does not work:

def avatar2(user: User) -> h.Renderable:
    return h.div(
        class_=[
            "font-bold text-blue-700",  # no colors, no hovering, etc.
            user.is_vip and "more-classes-here",
        ]
    )[user.name]

Stepping back, these newer libraries in Python-land look to me a lot like Hyperscript did in JavaScript-land before JSX arrived. There are efforts to add core language features for templating to Python but even if and when they ship, it'll take a while for community support to become widespread. Until then, HTML-in-Python builders are probably here to stay!