Check more details in the [Deployment](deployment/index.md) section.

///

## Benchmarks and speed { #benchmarks-and-speed }

 * on what responses can be stored, and which requests can be satisfied by those stored responses.
 *
 * See [RFC 7234, 5.2](https://tools.ietf.org/html/rfc7234#section-5.2).
 */
class CacheControl internal constructor(
  /**
   * In a response, this field's name "no-cache" is misleading. It doesn't prevent us from caching

 * of the access check algorithm used by Windows is required. The following
 * is a basic description of the algorithm. For a more complete description
 * we recommend reading the section on Access Control in Keith Brown's
 * "The .NET Developer's Guide to Windows Security" (which is also
 * available online).
 * <p>
 * Direct ACEs are evaluated first in order. The SID of the user performing

///

### JSON Schema’nın `examples` alanı { #json-schemas-examples-field }

Sonrasında JSON Schema, spesifikasyonun yeni bir sürümüne [`examples`](https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.9.5) alanını ekledi.

Ardından yeni OpenAPI 3.1.0, bu yeni `examples` alanını içeren en güncel sürümü (JSON Schema 2020-12) temel aldı.

      this License, each Contributor hereby grants to You a perpetual,
      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
      (except as stated in this section) patent license to make, have made,
      use, offer to sell, sell, import, and otherwise transfer the Work,
      where such license applies only to those patent claims licensable

// 이제 환경 변수를 읽을 수 있습니다

Hello Wade Wilson from Python

// 이후에는 해당 환경 변수가 존재하지 않습니다
$ python main.py

Hello World from Python
```

</div>

/// tip | 팁

[The Twelve-Factor App: Config](https://12factor.net/config) 에서 좀 더 자세히 알아볼 수 있습니다.

///

## 타입과 검증 { #types-and-validation }

// 现在就可以读取到环境变量了

Hello Wade Wilson from Python

// 在此之后这个环境变量将不会依然存在
$ python main.py

Hello World from Python
```

</div>

/// tip | 提示

你可以在 [The Twelve-Factor App: 配置](https://12factor.net/config) 中了解更多信息。

///

## 类型和验证 { #types-and-validation }

这些环境变量只能处理**文本字符串**，因为它们是处于 Python 范畴之外的，必须与其他程序和操作系统的其余部分兼容（甚至与不同的操作系统兼容，如 Linux、Windows、macOS）。

It doesn't matter. **FastAPI** will know what to do.

/// note

If you don't know, check the [Async: *"In a hurry?"*](../../async.md#in-a-hurry) section about `async` and `await` in the docs.

///

## Integrated with OpenAPI { #integrated-with-openapi }

          // requireNonNull is safe because right must exist in order to get a negative factor.
          requireNonNull(right);
          if (right.balanceFactor() > 0) {
            right = right.rotateRight();
          }
          return rotateLeft();
        case 2:
          // requireNonNull is safe because left must exist in order to get a positive factor.
          requireNonNull(left);
          if (left.balanceFactor() < 0) {

   * files with extension "PSB" are in a distinct but related format).
   *
   * <p>This is a more recent replacement for the older, experimental type {@code x-photoshop}: <a
   * href="http://tools.ietf.org/html/rfc2046#section-6">RFC-2046.6</a>.
   *
   * @since 15.0
   */
  public static final MediaType PSD = createConstant(IMAGE_TYPE, "vnd.adobe.photoshop");