# `Response` class

You can declare a parameter in a *path operation function* or dependency to be of type `Response` and then you can set data for the response like headers or cookies.

You can also use it directly to create an instance of it and return it from your *path operations*.

You can import it directly from `fastapi`:

```python
from fastapi import Response
```

        "copyOf(ImmutableSetMultimap) should not create a new instance",
        setMultimap,
        setMultimapCopy);

    ImmutableListMultimap<String, String> listMultimap = ImmutableListMultimap.of("k1", "v1");
    ImmutableMultimap<String, String> listMultimapCopy = ImmutableMultimap.copyOf(listMultimap);
    assertSame(
        "copyOf(ImmutableListMultimap) should not create a new instance",
        listMultimap,

But it's the simplest way to focus on the server-side of WebSockets and have a working example:

```Python hl_lines="2  6-38  41-43"
{!../../docs_src/websockets/tutorial001.py!}
```

## Create a `websocket`

In your **FastAPI** application, create a `websocket`:

```Python hl_lines="1  46-47"
{!../../docs_src/websockets/tutorial001.py!}
```

/// note | "Technical Details"

      return sizeIfKnown.get();
    }

    Closer closer = Closer.create();
    try {
      InputStream in = closer.register(openStream());
      return countBySkipping(in);
    } catch (IOException e) {
      // skip may not be supported... at any rate, try reading
    } finally {
      closer.close();
    }

    closer = Closer.create();
    try {
      InputStream in = closer.register(openStream());

 * limitations under the License.
 */

package com.google.common.collect;

import com.google.caliper.Benchmark;
import com.google.caliper.Param;
import java.util.List;

/**
 * Benchmark for various ways to create an {@code ImmutableList}.
 *
 * @author Louis Wasserman
 */
public class ImmutableListCreationBenchmark {

  @Param({"10", "1000", "1000000"})
  int size;

  private static final Object OBJECT = new Object();

    array[getNullLocation()] = null;
    return array;
  }

  protected void initCollectionWithNullElement() {
    E[] array = createArrayWithNullElement();
    resetContainer(getSubjectGenerator().create(array));
  }

  /**
   * Equivalent to {@link #expectMissing(Object[]) expectMissing}{@code (null)} except that the call
   * to {@code contains(null)} is permitted to throw a {@code NullPointerException}.
   *

 * limitations under the License.
 */

package com.google.common.collect;

import com.google.caliper.Benchmark;
import com.google.caliper.Param;
import java.util.List;

/**
 * Benchmark for various ways to create an {@code ImmutableList}.
 *
 * @author Louis Wasserman
 */
public class ImmutableListCreationBenchmark {

  @Param({"10", "1000", "1000000"})
  int size;

  private static final Object OBJECT = new Object();

 *
 * @since 4.0.0
 */
@Experimental
public interface MavenParser<R extends MavenInvokerRequest<? extends MavenOptions>> extends Parser<R> {
    /**
     * Parses the given {@link ParserRequest} to create a {@link MavenInvokerRequest}.
     * This method is responsible for interpreting the contents of the ParserRequest
     * and constructing the appropriate {@link MavenInvokerRequest} object for Maven operations.
     *

    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/user/": {
                "post": {
                    "summary": "Create User",
                    "operationId": "create_user_user__post",
                    "requestBody": {
                        "content": {
                            "application/json": {

---
name: Bug report
about: Create a report to help us improve
title: ''
labels: community, triage
assignees: ''

---

## NOTE
All GitHub issues are addressed on a best-effort basis at MinIO's sole discretion. There are no Service Level Agreements (SLA) or Objectives (SLO). Remember our [Code of Conduct](https://github.com/minio/minio/blob/master/code_of_conduct.md) when engaging with MinIO Engineers and the larger community.