* 100% <dfn title="A quantidade de código que é testada automaticamente">de cobertura de testes</dfn>.
* 100% do código com <dfn title="Anotações de tipo do Python, com isso seu editor e ferramentas externas podem te dar um suporte melhor">anotações de tipo</dfn>.
* Usado para aplicações em produção.

## Recursos do Starlette { #starlette-features }

Sie können beliebige Kombinationen von Abhängigkeiten haben.

**FastAPI** stellt sicher, dass alles in der richtigen Reihenfolge ausgeführt wird.

/// note | Technische Details

Dieses funktioniert dank Pythons [Kontextmanager](https://docs.python.org/3/library/contextlib.html).

**FastAPI** verwendet sie intern, um das zu erreichen.

///

pkg net/http, type Transport struct, DialTLS func(string, string) (net.Conn, error)

# CL 132750043 net/http/httputil: Pass a Logger to ReverseProxy, allowing the user to control logging., Mark Theunissen <mark******@****.***>
pkg net/http/httputil, type ReverseProxy struct, ErrorLog *log.Logger

# CL 148370043 os, syscall: add Unsetenv, Brad Fitzpatrick <******@****.***>
pkg os, func Unsetenv(string) error

Der Inhalt jedes dieser Strings kann ein beliebiges Format haben, sollte jedoch keine Leerzeichen enthalten.

Diese Scopes stellen „Berechtigungen“ dar.

In OpenAPI (z. B. der API-Dokumentation) können Sie „Sicherheitsschemas“ definieren.

Wenn eines dieser Sicherheitsschemas OAuth2 verwendet, können Sie auch Scopes deklarieren und verwenden.

    proxySelector.proxies.add(proxyA)
    proxySelector.proxies.add(proxyB)
    var routeSelector = newRouteSelector(address)
    dns[PROXY_A_HOST] = dns.allocate(1)
    dns[PROXY_B_HOST] = dns.allocate(1)

    // Mark the ProxyA route as failed.
    val selection = routeSelector.next()
    dns.assertRequests(PROXY_A_HOST)
    val route = selection.next()
    assertRoute(route, address, proxyA, dns.lookup(PROXY_A_HOST, 0), PROXY_A_PORT)

---

Ama bu örnek kodun detaylarını merak ediyorsanız, birkaç ek bilgi:

#### `value.startswith()` ile String { #string-with-value-startswith }

Fark ettiniz mi? `value.startswith()` ile bir string, tuple alabilir ve tuple içindeki her değeri kontrol eder:

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py ln[16:19] hl[17] *}

import pytest
from fastapi.testclient import TestClient
from inline_snapshot import snapshot

from .main import app

client = TestClient(app)


@pytest.mark.parametrize(
    "path,expected_status,expected_response",
    [
        ("/api_route", 200, {"message": "Hello World"}),
        ("/non_decorated_route", 200, {"message": "Hello World"}),
        ("/nonexistent", 404, {"detail": "Not Found"}),
    ],
)

Como este pequeno exemplo não precisa de nenhuma instrução `await`, adicionamos um `await anyio.sleep(0)` para dar ao event loop a chance de lidar com o cancelamento.

Isso seria ainda mais importante com streams grandes ou infinitos.

///

/// tip | Dica

	// All the parts per object.
	Parts []ObjectPartInfo `msg:"parts"`

	// Erasure info for all objects.
	Erasure ErasureInfo `msg:"ei"`

	MarkDeleted      bool             `msg:"md"` // mark this version as deleted
	ReplicationState ReplicationState `msg:"rs"` // Internal replication state to be passed back in ObjectInfo

	Data []byte `msg:"d,allownil"` // optionally carries object data

  /**
   * Files in the <a href="https://www.dartlang.org/articles/embedding-in-html/">dart</a>
   * programming language.
   *
   * @since 19.0
   */
  public static final MediaType DART_UTF_8 = createConstantUtf8(APPLICATION_TYPE, "dart");

  /**
   * <a