The artless and minimalist templating for Python server-side rendering.
Project description
artless-template
The artless and minimalist templating for Python server-side rendering.
artless-template is a tiny (under 200 lines), dependency-free template engine, designed for generating HTML using either template files or native Python objects.
Perfect for modern, clean server-side rendering with a focus on simplicity, performance, and patterns like HTMX and No-JS.
Why artless-template?
- 🪶 Tiny: Single module, no dependencies, no magic, no bloat
- ⚡ Fast & Small: Under 200 LOC, built for speed (see benchmarks)
- 🧹 Functional style: Mostly pure functions, no side effects, fully type-annotated
- 🐍 Modern: Python 3.11+ only
- ✅ Tested: 100% test coverage.
- 📚 Well-documented: With usage examples.
Quickstart
Installation
From PyPI:
$ pip install artless-template
From source:
$ git clone https://git.peterbro.su/peter/py3-artless-template
$ cd py3-artless-template
$ pip install .
Template and tags usage
Create templates/index.html with contents:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>@title</title>
</head>
<body>
<main>
<section>
<h1>@header</h1>
<table>
<thead>
<tr>
<th>Name</th>
<th>Email</th>
<th>Admin</th>
</tr>
</thead>
@users
</table>
</section>
</main>
</body>
</html>
from typing import final
from pathlib import Path
from random import randint
from dataclasses import dataclass
from artless_template import read_template, Tag as t
TEMPLATES_DIR: Path = Path(__file__).resolve().parent / "templates"
@final
@dataclass(frozen=True, slots=True, kw_only=True)
class UserModel:
name: str
email: str
is_admin: bool
users = [
UserModel(
name=f"User_{_}", email=f"user_{_}@gmail.com", is_admin=bool(randint(0, 1))
)
for _ in range(10_000)
]
users_markup = t(
"tbody",
children=[
t(
"tr",
[
t("td", user.name),
t("td", user.email),
t("td", "+" if user.is_admin else "-"),
],
)
for user in users
],
)
context = {
"title": "Artless-template example",
"header": "Users list",
"users": users_markup,
}
template = read_template(TEMPLATES_DIR / "index.html").render(**context)
Template and components usage
<!DOCTYPE html>
<html lang="en">
...
<body>
<main>
@main
</main>
</body>
</html>
from artless_template import read_template, Component, Tag as t
...
class UsersTableComponent:
def __init__(self, count: int):
self.users = [
UserModel(
name=f"User_{_}", email=f"user_{_}@gmail.com", is_admin=bool(randint(0, 1))
)
for _ in range(count)
]
def view(self):
return t(
"table",
[
t(
"thead",
[
t(
"tr",
[
t("th", "Name"),
t("th", "Email"),
t("th", "Admin"),
]
)
]
),
t(
"tbody",
[
t(
"tr",
[
t("td", user.name),
t("td", user.email),
t("td", "+" if user.is_admin else "-"),
],
)
for user in self.users
]
)
]
)
template = read_template(TEMPLATES_DIR / "index.html").render(main=UsersTableComponent(100500))
Asynchronous functions
The library provides async version of io-bound function - read_template. An asynchronous function has a prefix and called aread_template.
from artless_template import aread_template
template = await aread_template("some_template.html")
...
Read detailed reference documentation.
Performance
Performance comparison of the most popular template engines and artless-template library. The benchmark render a HTML document with table of 10 thousand user models.
Run benchmark:
$ python -m bemchmarks
Sorted results on i5 laptop (smaller is better):
{
'mako': 0.05319607999990694,
'jinja2': 0.27525966498069465,
'artless': 0.5908581139810849,
'dtl': 1.034598412021296,
'fasthtml': 12.420113595988369
}
- Mako (0.05319 sec.)
- Jinja2 (0.27525 sec.)
- Artless-template (0.59085 sec.)
- Django templates (1.03459 sec.)
- FastHTML (12.42011 sec.)
The performance of artless-template is better than the Django template engine, and much better than FastHTML, but worse than Jinja2 and Mako.
Roadmap
- Simplify the Tag constructor.
- Write detailed documentation with Sphinx.
- Create async version of
read_template()-aread_template(). - Cythonize CPU/RAM-bound of code.
Related projects
- artless-core - the artless and ultralight web framework for building minimal APIs and apps.
Release history Release notifications | RSS feed
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