```

////

/// tip | "Dica"

Estamos usando um cabeçalho inventado para simplificar este exemplo.

Mas em casos reais, você obterá melhores resultados usando os [Utilitários de Segurança](security/index.md){.internal-link target=_blank} integrados.

///

## Outro módulo com `APIRouter`

Digamos que você também tenha os endpoints dedicados a manipular "itens" do seu aplicativo no módulo em `app/routers/items.py`.

)

// Tests isObjectDangling function
func TestIsObjectDangling(t *testing.T) {
	fi := newFileInfo("test-object", 2, 2)
	fi.Erasure.Index = 1

	ifi := newFileInfo("test-object", 2, 2)
	ifi.SetInlineData()
	ifi.Erasure.Index = 1

	testCases := []struct {
		name             string
		metaArr          []FileInfo
		errs             []error
		dataErrs         map[int][]int

        sequenceNumber,
        socket,
      )
    atomicRequestCount.incrementAndGet()
    requestQueue.add(request)
    dispatcher.dispatch(request)
  }

  /** @param sequenceNumber the index of this request on this connection.*/
  @Throws(IOException::class)
  private fun readRequest(
    socket: Socket,
    source: BufferedSource,
    sink: BufferedSink,
    sequenceNumber: Int,

					wantName = test.output[:len(test.output)-4]
					if strings.HasPrefix(wantName, "$") || strings.HasPrefix(wantName, "*") {
						wantName = wantName[1:]
					}
					if i := strings.Index(wantName, "+"); i >= 0 {
						wantName = wantName[:i]
					}
				}
				if ok != isFuncSym || name != wantName {

			tx.AddError(ErrPrimaryKeyRequired)
			break
		}

		primaryValue, zero := result.Statement.Schema.PrioritizedPrimaryField.ValueOf(tx.Statement.Context, resultsValue.Index(resultsValue.Len()-1))
		if zero {
			tx.AddError(ErrPrimaryKeyRequired)
			break
		}
		queryDB = tx.Clauses(clause.Gt{Column: clause.Column{Table: clause.CurrentTable, Name: clause.PrimaryKey}, Value: primaryValue})

{!> ../../docs_src/query_params_str_validations/tutorial001.py!}
```

////

The query parameter `q` is of type `Union[str, None]` (or `str | None` in Python 3.10), that means that it's of type `str` but could also be `None`, and indeed, the default value is `None`, so FastAPI will know it's not required.

/// note

FastAPI will know that the value of `q` is not required because of the default value `= None`.

                break;
            }
        }

        this.canon = new String(out, 0, prefixLen);
        if ( prefixLen > 1 ) {
            prefixLen--;
            int firstSep = this.canon.indexOf('/', 1);
            if ( firstSep < 0 ) {
                this.share = this.canon.substring(1);
                this.unc = "\\";
            }
            else if ( firstSep == prefixLen ) {

type comparable interface{ comparable }

// iota is a predeclared identifier representing the untyped integer ordinal
// number of the current const specification in a (usually parenthesized)
// const declaration. It is zero-indexed.
const iota = 0 // Untyped int.

// nil is a predeclared identifier representing the zero value for a
// pointer, channel, func, interface, map, or slice type.

さらに、Pythonが**データサイエンス**、機械学習、特にディープラーニングの主要言語であるという単純な事実により、FastAPIはデータサイエンス/機械学習のWeb APIおよびアプリケーション (他の多くのアプリケーションとの) に非常によく適合しています。

本番環境でこの並列処理を実現する方法については、[デプロイ](deployment/index.md){.internal-link target=_blank}に関するセクションを参照してください。

## `async` と `await`

現代的なバージョンのPythonには、非同期コードを定義する非常に直感的な方法があります。これにより、通常の「シーケンシャル」コードのように見え、適切なタイミングで「待機」します。

⚫️ 👍 💽 💃 & **FastAPI**.

/// check | "**FastAPI** 👍 ⚫️"

👑 🕸 💽 🏃 **FastAPI** 🈸.

👆 💪 🌀 ⚫️ ⏮️ 🐁, ✔️ 🔁 👁-🛠️ 💽.

✅ 🌅 ℹ [🛠️](deployment/index.md){.internal-link target=_blank} 📄.

///

## 📇 & 🚅