When the `with` block finishes, it makes sure to close the file, even if there were exceptions.

When you create a dependency with `yield`, **FastAPI** will internally create a context manager for it, and combine it with some other related tools.

### Using context managers in dependencies with `yield` { #using-context-managers-in-dependencies-with-yield }

/// warning

This is, more or less, an "advanced" idea.

```console
$ fastapi dev main.py
```

But you would have to remember to pass the correct path every time you call the `fastapi` command.

Additionally, other tools might not be able to find it, for example the [VS Code Extension](../editor-support.md) or [FastAPI Cloud](https://fastapicloud.com), so it is recommended to use the `entrypoint` in `pyproject.toml`.

```console
$ fastapi dev main.py
```

Aber Sie müssten sich daran erinnern, bei jedem Aufruf des `fastapi`-Befehls den korrekten Pfad zu übergeben.

Zusätzlich könnten andere Tools es nicht finden, z. B. die [VS Code-Erweiterung](../editor-support.md) oder [FastAPI Cloud](https://fastapicloud.com). Daher wird empfohlen, den `entrypoint` in `pyproject.toml` zu verwenden.

		return ""
	}
	return v.toPromName(mg.CollectorPath.metricPrefix())
}

func (mg *MetricsGroup) validate() {
	if len(mg.Descriptors) == 0 {
		panic("Descriptors must be set")
	}

	// For bools A and B, A XOR B <=> A != B.
	isExactlyOneSet := (mg.loader == nil) != (mg.bucketLoader == nil)
	if !isExactlyOneSet {
		panic("Exactly one Loader function must be set")
	}

Sobald Sie jedoch die grundlegenden Informationen zu **HTTPS für Entwickler** kennen, können Sie verschiedene Tools problemlos kombinieren und konfigurieren, um alles auf einfache Weise zu verwalten.

프레임워크 전체는 사용하기 쉽고 직관적으로 설계되었으며, 최고의 개발 경험을 보장하기 위해 개발을 시작하기도 전에 모든 결정은 여러 편집기에서 테스트되었습니다.

Python 개발자 설문조사에서 [가장 많이 사용되는 기능 중 하나가 "자동 완성"이라는 점](https://www.jetbrains.com/research/python-developers-survey-2017/#tools-and-features)이 분명합니다.

**FastAPI** 프레임워크 전체는 이를 만족하기 위해 만들어졌습니다. 자동 완성은 어디서나 작동합니다.

문서로 다시 돌아올 일은 거의 없을 것입니다.

편집기가 여러분을 어떻게 도와줄 수 있는지 살펴보세요:

* [Visual Studio Code](https://code.visualstudio.com/)에서:

			log.Printf("\n%s", out)
		}
		return fmt.Errorf("%v: %w", cmd, err)
	}
	if err := adb("exec-out", "mkdir", "-p", deviceGoroot); err != nil {
		return err
	}

	// Copy the Android tools from the relevant bin subdirectory to GOROOT/bin.
	cmd = exec.Command(goTool, "list", "-f", "{{.Target}}", "cmd/go")
	cmd.Stderr = os.Stderr
	out, err = cmd.Output()
	if err != nil {

Wenn Sie eine Abhängigkeit mit `yield` erstellen, erstellt **FastAPI** dafür intern einen Kontextmanager und kombiniert ihn mit einigen anderen zugehörigen Tools.

### Kontextmanager in Abhängigkeiten mit `yield` verwenden { #using-context-managers-in-dependencies-with-yield }

/// warning | Achtung

Dies ist mehr oder weniger eine „fortgeschrittene“ Idee.

    assertThat(base.resolve("ht-tp//b/")).isEqualTo(parse("http://a/ht-tp//b/"))
    assertThat(base.resolve("ht.tp//b/")).isEqualTo(parse("http://a/ht.tp//b/"))
  }

  /**
   * https://tools.ietf.org/html/rfc3986#section-5.4.1
   */
  @Test
  fun rfc3886NormalExamples() {
    val url = parse("http://a/b/c/d;p?q")
    // No 'g:' scheme in HttpUrl.
    assertThat(url.resolve("g:h")).isNull()

import okhttp3.internal.toCanonicalHost
import okhttp3.internal.trimSubstring
import okhttp3.internal.unmodifiable
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

/**
 * An [RFC 6265](http://tools.ietf.org/html/rfc6265) Cookie.
 *
 * This class doesn't support additional attributes on cookies, like
 * [Chromium's Priority=HIGH extension][chromium_extension].
 *