Para instalarlo manualmente, asegúrate de crear un [entorno virtual](../../virtual-environments.md), activarlo, y luego instalarlo con:

```console
$ pip install python-multipart
```

Esto se debe a que **OAuth2** utiliza "form data" para enviar el `username` y `password`.

///

Ejecuta el ejemplo con:

<div class="termy">

```console
$ fastapi dev

Para instalá-lo manualmente, certifique-se de criar um [ambiente virtual](../../virtual-environments.md), ativá-lo e então instalá-lo com:

```console
$ pip install python-multipart
```

Isso ocorre porque o **OAuth2** usa "form data" para enviar o `username` e o `password`.

///

Execute o exemplo com:

<div class="termy">

```console
$ fastapi dev

but guarantees never to return nil. If C's malloc indicates out of memory,
the helper function crashes the program, like when Go itself runs out
of memory. Because C.malloc cannot fail, it has no two-result form
that returns errno.

# C references to Go

Go functions can be exported for use by C code in the following way:

	//export MyFunction
	func MyFunction(arg1, arg2 int, arg3 string) int64 {...}

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[8:9] *}

Das war's schon.

**Zwei Zeilen**.

Und sie hat die gleiche Form und Struktur wie alle Ihre *Pfadoperation-Funktionen*.

Sie können sie sich als *Pfadoperation-Funktion* ohne den „Dekorator“ (ohne `@app.get("/some-path")`) vorstellen.

Und sie kann alles zurückgeben, was Sie möchten.

errors.New("mldsa: unreduced field element") // fieldToMontgomery checks that a value a is < q, and converts it to // Montgomery form. func fieldToMontgomery(a uint32) (fieldElement, error) { if a >= q { return 0, errUnreducedFieldEle } // a * R² * R⁻¹ ≡ a * R (mod q) return fieldMontgomeryMul(fieldElement(a), RR), nil } // fieldSubToMontgomery converts a difference a - b to Montgomery form. // a and b must be < q. (This bound can probably be relaxed.) func fieldSubToMontgomery(a, b uint32) fieldElement { x...

///

/// warning | Alertes

Vous devez vous assurer d'utiliser **toujours** la **forme exec** de l'instruction `CMD`, comme expliqué ci-dessous.

///

#### Utiliser `CMD` - Forme Exec { #use-cmd-exec-form }

L'instruction Docker [`CMD`](https://docs.docker.com/reference/dockerfile/#cmd) peut être écrite sous deux formes :

✅ Forme **Exec** :

```Dockerfile
# ✅ À faire

	// use the normalized form of the entityName (which will be an LDAP DN).
	userType := IAMUserType(mapping.UserType)
	isGroup := mapping.IsGroup
	entityName := mapping.UserOrGroup

	if globalIAMSys.GetUsersSysType() == LDAPUsersSysType && userType == stsUser {
		// Validate that the user or group exists in LDAP and use the normalized
		// form of the entityName (which will be an LDAP DN).

## Scope'lu JWT token { #jwt-token-with-scopes }

Şimdi token *path operation*'ını, istenen scope'ları döndürecek şekilde değiştirin.

Hâlâ aynı `OAuth2PasswordRequestForm` kullanılıyor. Bu form, request'te aldığı her scope için `str`'lerden oluşan bir `list` içeren `scopes` özelliğine sahiptir.

Ve scope'ları JWT token'ın bir parçası olarak döndürüyoruz.

/// danger | Uyarı

func extractMetadataFromReq(ctx context.Context, r *http.Request) (metadata map[string]string, err error) {
	return extractMetadata(ctx, textproto.MIMEHeader(r.Form), textproto.MIMEHeader(r.Header))
}

func extractMetadata(ctx context.Context, mimesHeader ...textproto.MIMEHeader) (metadata map[string]string, err error) {
	metadata = make(map[string]string)

/// tip | 提示

点击代码中的每个编号气泡查看每行的作用。👆

///

/// warning | 警告

务必**始终**使用 `CMD` 指令的**exec 形式**，如下所述。

///

#### 使用 `CMD` - Exec 形式 { #use-cmd-exec-form }

[`CMD`](https://docs.docker.com/reference/dockerfile/#cmd) 指令有两种写法：

✅ **Exec** 形式：

```Dockerfile
# ✅ 推荐
CMD ["fastapi", "run", "app/main.py", "--port", "80"]
```

⛔️ **Shell** 形式：