"size": "XL"
  }
}
```

#### O `HTTPException` do FastAPI vs o `HTTPException` do Starlette.

O **FastAPI** tem o seu próprio `HTTPException`.

E a classe de erro `HTTPException` do **FastAPI** herda da classe de erro do `HTTPException` do Starlette.

A diferença entre os dois é a de que o `HTTPException` do **FastAPI** permite que você adicione *headers* que serão incluídos nas *responses*.

# Основные свойства

## Основные свойства FastAPI

**FastAPI** предлагает вам следующее:

### Использование открытых стандартов

from fastapi import FastAPI
from fastapi.responses import PlainTextResponse

app = FastAPI()


@app.get("/", response_class=PlainTextResponse)
async def main():

from fastapi import FastAPI
from fastapi.testclient import TestClient

app = FastAPI()

items = {}


@app.on_event("startup")
async def startup_event():
    items["foo"] = {"name": "Fighters"}
    items["bar"] = {"name": "Tenders"}


@app.get("/items/{item_id}")
async def read_items(item_id: str):
    return items[item_id]


def test_read_items():
    with TestClient(app) as client:

from fastapi import APIRouter, FastAPI
from fastapi.testclient import TestClient

app = FastAPI()

router = APIRouter()


@router.get("/users/{id}")
def read_user(segment: str, id: str):
    return {"segment": segment, "id": id}


app.include_router(router, prefix="/{segment}")


client = TestClient(app)


def test_get():
    response = client.get("/seg/users/foo")

from fastapi import FastAPI
from fastapi.responses import FileResponse

some_file_path = "large-video-file.mp4"
app = FastAPI()


@app.get("/")
async def main():

## ویژگی های Starlette

**FastAPI** کاملا (و براساس) با <a href="https://www.starlette.io/" class="external-link" target="_blank"><strong>Starlette</strong></a> سازگار است. بنابراین، هرکد اضافی Starlette که دارید، نیز کار خواهد کرد.

‍‍`FastAPI` در واقع یک زیرکلاس از `Starlette` است. بنابراین اگر از قبل Starlette را میشناسید یا با آن کار کرده اید، بیشتر قابلیت ها به همین روش کار خواهد کرد.

  <a href="https://fastapi.tiangolo.com"><img src="https://fastapi.tiangolo.com/img/logo-margin/logo-teal.png" alt="FastAPI"></a>
</p>
<p align="center">
    FastAPI framework, alte prestazioni, facile da imparare, rapido da implementare, pronto per il rilascio in produzione
</p>
<p align="center">
<a href="https://travis-ci.com/fastapi/fastapi" target="_blank">

      <a class="announce-link" href="https://twitter.com/fastapi" target="_blank">
        <span class="twemoji twitter">
          {% include ".icons/fontawesome/brands/twitter.svg" %}
        </span> Follow <strong>@fastapi</strong> on <strong>Twitter</strong> to stay updated
      </a>
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    <div class="item">
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# Fonctionnalités

## Fonctionnalités de FastAPI

**FastAPI** vous offre ceci:

### Basé sur des standards ouverts