pip install fastapi-jinja-utils
from fastapi_jinja_utils import Jinja2TemplatesDependency
jinja = Jinja2TemplatesDependency("/templates")
@app.get("/")
def my_view(..., render: JinjaTemplatesDependency = Depends(jinja)):
...
return render("my_template.html.jinja2", context={"name": name})