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

    private set
  private var throttlePeriodAmount = 1L
  private var throttlePeriodUnit = TimeUnit.SECONDS

  @set:JvmName("socketPolicy")
  var socketPolicy: SocketPolicy = SocketPolicy.KEEP_OPEN

  @set:JvmName("http2ErrorCode")
  var http2ErrorCode: Int = -1

  private var bodyDelayAmount = 0L
  private var bodyDelayUnit = TimeUnit.MILLISECONDS

  private var headersDelayAmount = 0L

        if (selfModality == Modality.OPEN) {
            val containingDeclaration = this.containingDeclaration
            if (containingDeclaration is ClassDescriptor && containingDeclaration.modality == Modality.FINAL) {
                if (this !is CallableMemberDescriptor || dispatchReceiverParameter != null) {
                    // Non-static open callables in final class are counted as final (to match FIR)

      }

      connectionPool.evictAll()
      assertEquals(0, connectionPool.connectionCount()) {
        "Still ${connectionPool.connectionCount()} connections open"
      }
    }
  }

  private fun ensureAllTaskQueuesIdle() {
    val entryTime = System.nanoTime()

    for (queue in TaskRunner.INSTANCE.activeQueues()) {

You can:

* <a href="https://github.com/tiangolo" class="external-link" target="_blank">Follow me on **GitHub**</a>.
    * See other Open Source projects I have created that could help you.
    * Follow me to see when I create a new Open Source project.

```Python hl_lines="6-7"
{!../../../docs_src/query_params/tutorial005.py!}
```

Here the query parameter `needy` is a required query parameter of type `str`.

If you open in your browser a URL like:

```
http://127.0.0.1:8000/items/foo-item
```

...without adding the required parameter `needy`, you will see an error like:

```JSON
{
  "detail": [
    {

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。

---
hide:
  - navigation
---

# Features

## FastAPI features

**FastAPI** gives you the following:

### Based on open standards

    mockResponse = mockResponse.setChunkedBody(Buffer(), 0)
    mockResponse = mockResponse.setChunkedBody("", 0)
    var socketPolicy: SocketPolicy = mockResponse.socketPolicy
    mockResponse.socketPolicy = SocketPolicy.KEEP_OPEN
    var http2ErrorCode: Int = mockResponse.http2ErrorCode
    mockResponse.http2ErrorCode = 0
    mockResponse = mockResponse.throttleBody(0L, 0L, TimeUnit.SECONDS)

 *
 * ```java
 * client.cache().close();
 * ```
 *
 * OkHttp also uses daemon threads for HTTP/2 connections. These will exit automatically if they
 * remain idle.
 */
open class OkHttpClient internal constructor(
  builder: Builder,
) : Call.Factory, WebSocket.Factory {
  @get:JvmName("dispatcher")
  val dispatcher: Dispatcher = builder.dispatcher

  /**