{* ../../docs_src/custom_response/tutorial007.py hl[2,14] *}

#### Usando `StreamingResponse` con objetos similares a archivos

Si tienes un objeto similar a un archivo (por ejemplo, el objeto devuelto por `open()`), puedes crear una función generadora para iterar sobre ese objeto similar a un archivo.

De esa manera, no tienes que leerlo todo primero en memoria, y puedes pasar esa función generadora al `StreamingResponse`, y devolverlo.

* **Robust**: Code gereed voor productie. Met automatische interactieve documentatie.

    assertEquals(set, Sets.subSet(set, Range.open(0, 12)));
    assertEquals(ImmutableSortedSet.of(2), Sets.subSet(set, Range.open(0, 4)));
    assertEquals(ImmutableSortedSet.of(4), Sets.subSet(set, Range.open(2, 6)));
    assertEquals(ImmutableSortedSet.of(4, 6), Sets.subSet(set, Range.open(3, 7)));
    assertEquals(empty, Sets.subSet(set, Range.open(20, 30)));

```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.

		gr, err := objectAPI.GetObjectNInfo(ctx, bucket, zipPath, rs, nil, opts)
		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
		defer gr.Close()
		rc, err = file.Open(gr)
		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
	} else {
		rc = io.NopCloser(bytes.NewReader([]byte{}))
	}

	defer rc.Close()

	Context                  context.Context
	Logger                   logger.Interface
	NowFunc                  func() time.Time
	CreateBatchSize          int
}

// Open initialize db session based on dialector
func Open(dialector Dialector, opts ...Option) (db *DB, err error) {
	config := &Config{}

	sort.Slice(opts, func(i, j int) bool {
		_, isConfig := opts[i].(*Config)
		_, isConfig2 := opts[j].(*Config)

one (even if it was for a different project), you probably don't need to do it
again.

[individual CLA]: https://cla.developers.google.com/about/google-individual

			{6, "\x00G\x00o\x00G"},
			{8, "\x00G\x00o\x00G\x00o"},
			{4, "end\n"},
		},
	}}

	for _, v := range vectors {
		t.Run(path.Base(v.file), func(t *testing.T) {
			f, err := os.Open(v.file)
			if err != nil {
				t.Fatalf("Open() error: %v", err)
			}
			defer f.Close()

			tr := NewReader(f)
			for i, tc := range v.cases {
				hdr, err := tr.Next()
				if err != nil || hdr == nil {

	}
	return
}

func TestInvalidCachedPlanSimpleProtocol(t *testing.T) {
	if DB.Dialector.Name() != "postgres" {
		return
	}

	db, err := gorm.Open(postgres.Open(postgresDSN), &gorm.Config{})
	if err != nil {
		t.Errorf("Open err:%v", err)
	}

	type Object1 struct{}
	type Object2 struct {
		Field1 string
	}
	type Object3 struct {
		Field2 string
	}

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,