例えば、<a href="https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files" class="external-link" target="_blank">ファイルを読み込むには`with`を使用することができます</a>:

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

その後の`open("./somefile.txt")`は「コンテキストマネージャ」と呼ばれるオブジェクトを作成します。

`with`ブロックが終了すると、例外があったとしてもファイルを確かに閉じます。

`yield`を依存関係を作成すると、**FastAPI** は内部的にそれをコンテキストマネージャに変換し、他の関連ツールと組み合わせます。

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Internamente, `open("./somefile.txt")` crea un objeto llamado "Context Manager".

Cuando el bloque `with` termina, se asegura de cerrar el archivo, incluso si hubo excepciones.

    /** The suggest settings. */
    protected final SuggestSettings suggestSettings;
    /** The reading converter. */
    protected final ReadingConverter readingConverter;
    /** The contents reading converter. */
    protected final ReadingConverter contentsReadingConverter;
    /** The normalizer. */
    protected final Normalizer normalizer;
    /** The analyzer. */

        }
    }

    public void test_complex_query_strings() {
        // Test various complex query strings
        String[] queryStrings = { "title:test", "content:\"quoted value\"", "field:value AND other:value", "field:value OR other:value",
                "field:[1 TO 100]", "field:value*", "field:?value", "field:~value", "field:value^2", "タイトル:テスト", "标题:测试", "제목:테스트" };

    * Otro ejemplo sería `201`, "Created". Comúnmente se usa después de crear un nuevo registro en la base de datos.
    * Un caso especial es `204`, "No Content". Este response se usa cuando no hay contenido para devolver al cliente, por lo tanto, el response no debe tener un body.

	}

	_, err := objectAPI.GetBucketInfo(ctx, bucketName, BucketOptions{})
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// PutBucketNotification always needs a Content-Length.
	if r.ContentLength <= 0 {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentLength), r.URL)
		return
	}

func (z *erasureServerPools) StorageInfo(ctx context.Context, metrics bool) StorageInfo {
	return globalNotificationSys.StorageInfo(ctx, z, metrics)
}

func (z *erasureServerPools) NSScanner(ctx context.Context, updates chan<- DataUsageInfo, wantCycle uint32, healScanMode madmin.HealScanMode) error {
	// Updates must be closed before we return.
	defer xioutil.SafeClose(updates)

	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

    /**
     * Download the protected words file for the specified dictionary.
     *
     * @param dictId identifier of the dictionary
     * @param body download request payload
     * @return stream response with file content
     */
    // GET /api/admin/dict/protwords/download/{dictId}
    @Execute
    public StreamResponse get$download(final String dictId, final DownloadBody body) {
        body.dictId = dictId;

        // Query was processed successfully

        // Test with multiple wildcards
        QueryContext queryContext2 = new QueryContext("*te*st*", false);
        WildcardQuery wildcardQuery2 = new WildcardQuery(new Term("content", "*te*st*"));

        QueryBuilder queryBuilder2 = queryCommand.convertWildcardQuery(queryContext2, wildcardQuery2, 1.0f);
        assertNotNull(queryBuilder2);

			break
		}
	}
}

// Tests presigned v2 signature.
func TestDoesPresignedV2SignatureMatch(t *testing.T) {
	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()

	obj, fsDir, err := prepareFS(ctx)
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(fsDir)
	if err = newTestConfig(globalMinioDefaultRegion, obj); err != nil {