/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="11-15"
{!> ../../docs_src/dependencies/tutorial002.py!}
```

////

Pay attention to the `__init__` method used to create the instance of the class:

//// tab | Python 3.10+

```Python hl_lines="12"
{!> ../../docs_src/dependencies/tutorial002_an_py310.py!}
```

////

//// tab | Python 3.9+

   * Why? We want for queries like containsKey(null) to return false, but the
   * GWT SortedMap implementation that we delegate to throws
   * NullPointerException if the comparator does. Since our construction
   * methods ensure that null is never present in the map, it's OK for the
   * comparator to look for it wherever it wants.
   *
   * Note that we do NOT touch the comparator returned by comparator(), which

///

In Python, you can create Context Managers by <a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank">creating a class with two methods: `__enter__()` and `__exit__()`</a>.

You can also use them inside of **FastAPI** dependencies with `yield` by using
`with` or `async with` statements inside of the dependency function:

```Python hl_lines="1-9  13"

  }

  // The java7 branch has different code depending on whether the entry indexes fit in a byte,
  // short, or int. The small table in testBuildKeepingLast_allowsOverwrite will test the byte
  // case. This method tests the short case.
  public void testBuildKeepingLast_shortTable() {
    Builder<Integer, String> builder = ImmutableMap.builder();
    Map<Integer, String> expected = new LinkedHashMap<>();

  // +optional
  optional string user = 3;

  // Groups is the groups you're testing for.
  // +optional
  repeated string group = 4;

  // Extra corresponds to the user.Info.GetExtra() method from the authenticator.  Since that is input to the authorizer
  // it needs a reflection here.
  // +optional
  map<string, ExtraValue> extra = 5;

  // UID information about the requesting user.
  // +optional

	}

	// Test use case 2: Make 9 disks offline, which leaves less than quorum number of disks
	// in a 16 disk Erasure setup. The original disks are 'replaced' with
	// naughtyDisks that fail after 'f' successful StorageAPI method
	// invocations, where f - [0,2)

	// Create "object" under "bucket".
	_, err = obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(buf), int64(len(buf)), "", ""), opts)
	if err != nil {

```JSON
{"item_id": 5, "q": "somequery"}
```

আপনি ইতিমধ্যে একটি API তৈরি করেছেন যা:

- `/` এবং `/items/{item_id}` _paths_ এ HTTP অনুরোধ গ্রহণ করে।
- উভয় *path*ই `GET` অপারেশন নেয় ( যা HTTP _methods_ নামেও পরিচিত)।
- _path_ `/items/{item_id}`-এ একটি _path প্যারামিটার_ `item_id` আছে যা কিনা `int` হতে হবে।
- _path_ `/items/{item_id}`-এর একটি ঐচ্ছিক `str` _query প্যারামিটার_ `q` আছে।

### ক্রিয়াশীল API নির্দেশিকা নথি

```JSON
{"item_id": 5, "q": "somequery"}
```

Ya creaste una API que:

* Recibe HTTP requests en los _paths_ `/` y `/items/{item_id}`.
* Ambos _paths_ toman operaciones `GET` (también conocido como HTTP _methods_).
* El _path_ `/items/{item_id}` tiene un _path parameter_ `item_id` que debería ser un `int`.
* El _path_ `/items/{item_id}` tiene un `str` _query parameter_ `q` opcional.

### Documentación interactiva de APIs

   */
  @Throws(IOException::class)
  private fun createTunnelRequest(route: Route): Request {
    val proxyConnectRequest =
      Request.Builder()
        .url(route.address.url)
        .method("CONNECT", null)
        .header("Host", route.address.url.toHostHeader(includeDefaultPort = true))
        .header("Proxy-Connection", "Keep-Alive") // For HTTP/1.0 proxies like Squid.
        .header("User-Agent", USER_AGENT)

  @Throws(IOException::class)
  override fun writeTo(sink: BufferedSink) {
    writeOrCountBytes(sink, false)
  }

  /**
   * Either writes this request to [sink] or measures its content length. We have one method do
   * double-duty to make sure the counting and content are consistent, particularly when it comes
   * to awkward operations like measuring the encoded length of header strings, or the