An example using a Jinja template with the Litestar framework for Python

app_jinja.py

from litestar import Litestar, get
from litestar.contrib.jinja import JinjaTemplateEngine
from litestar.response import Template
from litestar.template.config import TemplateConfig
from litestar.exceptions import HTTPException
from pydantic import BaseModel

class User(BaseModel):
    user_id: int
    name: str
    age: int
    email: str

DUMMY_USER_STORE: list[User] = [
    User(user_id=1, name="John Doe", age=30, email="[email protected]"),
    User(user_id=2, name="Jane Doe", age=25, email="[email protected]")
]

@get("/user/{user_id:int}")
async def user(user_id: int) -> Template:
    user = [u for u in DUMMY_USER_STORE if u.user_id == user_id]
    if len(user)>0:
        name = user[0].name
        return Template(template_name="user.html", context={"name": name})
    else:
        raise HTTPException(status_code=400, detail="User not found")

@get("/users")
async def users() -> Template:
    users=DUMMY_USER_STORE
    return Template(template_name="users.html", context={"users": users})

app = Litestar(
    route_handlers=[user, users],
    template_config=TemplateConfig(directory=".\\templates", engine=JinjaTemplateEngine),
)