# Erste Schritte { #first-steps }

Die einfachste FastAPI-Datei könnte wie folgt aussehen:

{* ../../docs_src/first_steps/tutorial001_py310.py *}

Kopieren Sie das in eine Datei `main.py`.

Starten Sie den Live-Server:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

   *
   * ```
   *   attackerCa
   *     -> attackerIntermediate
   *         -> phonyVictim
   * ```
   *
   * Some implementations fail the TLS handshake when they see the long chain, and don't give
   * CertificatePinner the opportunity to produce a different chain from their own. This includes
   * the OpenJDK 11 TLS implementation, which itself fails the handshake when it encounters a non-CA
   * certificate.
   */

/// note

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

Having `str | None` will allow your editor to give you better support and detect errors.

///

## Additional validation { #additional-validation }

	if o.IsLatest {
		ts.NumObjects = 1
	}
	return ts
}

// ToObjectInfo converts a replication object info to a partial ObjectInfo
// do not rely on this function to give you correct ObjectInfo, this
// function is merely and optimization.
func (ri ReplicateObjectInfo) ToObjectInfo() ObjectInfo {
	return ObjectInfo{
		Name:                       ri.Name,

# Перші кроки { #first-steps }

Найпростіший файл FastAPI може виглядати так:

{* ../../docs_src/first_steps/tutorial001_py310.py *}

Скопіюйте це до файлу `main.py`.

Запустіть live-сервер:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

		sseS3 := crypto.S3.IsEncrypted(result.UserDefined)
		if !sseKMS && !sseS3 { // neither sse-s3 nor sse-kms disallowed
			continue
		}
		wk.Take()
		go func() {
			defer wk.Give()
			for attempts := 1; attempts <= retryAttempts; attempts++ {
				stopFn := globalBatchJobsMetrics.trace(batchJobMetricKeyRotation, job.ID, attempts)
				success := true

	fmt.Println(bytes.ContainsFunc([]byte("World"), f))
	// Output:
	// false
	// true
}

func ExampleCount() {
	fmt.Println(bytes.Count([]byte("cheese"), []byte("e")))
	fmt.Println(bytes.Count([]byte("five"), []byte(""))) // before & after each rune
	// Output:
	// 3
	// 5
}

func ExampleCut() {
	show := func(s, sep string) {
		before, after, found := bytes.Cut([]byte(s), []byte(sep))

		}
	}
}

func TestXLStorageIsDirEmpty(t *testing.T) {
	tmp := t.TempDir()

	// Should give false on non-existent directory.
	dir1 := slashpath.Join(tmp, "non-existent-directory")
	if isDirEmpty(dir1, true) {
		t.Error("expected false for non-existent directory, got true")
	}

	// Should give false for not-a-directory.
	dir2 := slashpath.Join(tmp, "file")
	err := os.WriteFile(dir2, []byte("hello"), 0o777)

		atomic.AddUint64(&globalSiteNetPerfRX.RX, uint64(n))
		if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
			// If there is a disconnection before globalNetPerfMinDuration (we give a margin of error of 1 sec)
			// would mean the network is not stable. Logging here will help in debugging network issues.
			if time.Since(connectTime) < (globalNetPerfMinDuration - time.Second) {
				adminLogIf(ctx, err)

constraints.CronExpression.message = {item}는 올바른 CRON 표현식이 아닙니다.

# ----------------------------------------------------------
# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = 로그인에 실패했습니다.
errors.app.illegal.transition = 잘못된 전환입니다. 다시 시도하십시오.