### Import `HTTPException` { #import-httpexception }

{* ../../docs_src/handling_errors/tutorial001.py hl[1] *}

### Raise an `HTTPException` in your code { #raise-an-httpexception-in-your-code }

`HTTPException` is a normal Python exception with additional data relevant for APIs.

Because it's a Python exception, you don't `return` it, you `raise` it.

Fungsi ini dipanggil **FastAPI** setiap kali menerima request ke URL "`/`" dengan operasi `GET`.

Di kondisi ini, ini adalah sebuah fungsi `async`.

---

Anda bisa mendefinisikan fungsi ini sebagai fungsi normal daripada `async def`:

{* ../../docs_src/first_steps/tutorial003.py hl[7] *}

/// note | Catatan

Ela será chamada pelo **FastAPI** sempre que receber uma requisição para a URL "`/ `" usando uma operação `GET`.

Neste caso, é uma função `assíncrona`.

---

Você também pode defini-la como uma função normal em vez de `async def`:

{* ../../docs_src/first_steps/tutorial003.py hl[7] *}

/// note | Nota

          documentation, if provided along with the Derivative Works; or,
          within a display generated by the Derivative Works, if and
          wherever such third-party notices normally appear. The contents
          of the NOTICE file are for informational purposes only and
          do not modify the License. You may add Your own attribution

The form field name is `scope` (in singular), but it is actually a long string with "scopes" separated by spaces.

Each "scope" is just a string (without spaces).

They are normally used to declare specific security permissions, for example:

* `users:read` or `users:write` are common examples.
* `instagram_basic` is used by Facebook / Instagram.
* `https://www.googleapis.com/auth/drive` is used by Google.

		"policy":    encodedPolicy,
		"signature": signature,
	}

	maps.Copy(formData, formInputData)

	// Create the multipart form.
	var buf bytes.Buffer
	w := multipart.NewWriter(&buf)

	// Set the normal formData
	for k, v := range formData {
		w.WriteField(k, v)
	}
	// Set the File formData
	writer, err := w.CreateFormFile("file", "upload.txt")
	if err != nil {
		// return nil, err
		return nil, err

Możesz dowolnie używać każdej operacji (metody HTTP).

**FastAPI** nie narzuca żadnego konkretnego znaczenia.

Informacje tutaj są przedstawione jako wskazówka, a nie wymóg.

Na przykład, używając GraphQL, normalnie wykonujesz wszystkie akcje używając tylko operacji `POST`.

///

### Krok 4: zdefiniuj **funkcję obsługującą ścieżkę**

To jest nasza "**funkcja obsługująca ścieżkę**":

* **ścieżka**: to `/`.

   *
   * Additionally, it seems that nestmates do not help with runtime reflection under *Android*, even
   * when we use a newer -source and -target. That doesn't normally matter for AbstractFutureState,
   * since Android should normally succed in using UnsafeAtomicHelper and thus never even try the
   * problematic AtomicReferenceFieldUpdaterAtomicHelper code path. However, the same problem *does*

{* ../../docs_src/settings/app02_an_py39/main.py hl[6,12:13] *}

/// tip | Consejo

Hablaremos del `@lru_cache` en un momento.

Por ahora puedes asumir que `get_settings()` es una función normal.

///

Y luego podemos requerirlo desde la *path operation function* como una dependencia y usarlo donde lo necesitemos.

{* ../../docs_src/settings/app02_an_py39/main.py hl[17,19:21] *}

          documentation, if provided along with the Derivative Works; or,
          within a display generated by the Derivative Works, if and
          wherever such third-party notices normally appear. The contents
          of the NOTICE file are for informational purposes only and
          do not modify the License. You may add Your own attribution