1. pip install fastapi uvicorn

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def read_root():
    return {"Hello": "World"}

python -m uvicorn main:app --reload

1. Path parameter and Query Parameter

@app.get("/items/{item_id}")
def read_item(item_id: int, q: str = None):
    return {"item_id": item_id, "q": q}

1. jinja 2

from fastapi import FastAPI, Request
from fastapi.responses import HTMLResponse
from fastapi.templating import Jinja2Templates
app = FastAPI()

templates = Jinja2Templates(directory="templates")

@app.get("/", response_class=HTMLResponse)
async def read_root(request: Request):
    return templates.TemplateResponse("index.html", {"request": request, "stocks": stocks_data[:5]})

1. Routing

from fastapi import APIRouter, Request, HTTPException
@router.get("/", response_class=HTMLResponse)
def read_root(request: Request):
    return templates.TemplateResponse("index.html", {"request": request})

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