특히 **Kubernetes**에서 실행할 때는 워커를 사용하기보다는, 대신 **컨테이너당 단일 Uvicorn 프로세스 하나**를 실행하고 싶을 가능성이 크지만, 해당 내용은 그 장의 뒤에서 설명하겠습니다.

///

## 여러 워커 { #multiple-workers }

`--workers` 명령어 옵션으로 여러 워커를 시작할 수 있습니다:

//// tab | `fastapi`

`fastapi` 명령어를 사용한다면:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> run --workers 4 <u style="text-decoration-style:solid">main.py</u>

.nav-fill .nav-item,.nav-fill>.nav-link{-ms-flex:1 1 auto;flex:1 1 auto;text-align:center}.nav-justified .nav-item,.nav-justified>.nav-link{-ms-flex-preferred-size:0;flex-basis:0;-ms-flex-positive:1;flex-grow:1;text-align:center}.tab-content>.tab-pane{display:none}.tab-content>.active{display:block}.navbar{position:relative;display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap;-ms-flex-align:center;align-items:center;-ms-flex-pack:justify;justify-content:space-between;padding:.5rem 1rem}.navbar...

OpenAPI JSON'u `openapi.json` diye bir dosyaya indirip, şu tarz bir script ile **öndeki tag'i kaldırabiliriz**:

{* ../../docs_src/generate_clients/tutorial004_py310.py *}

//// tab | Node.js

```Javascript
{!> ../../docs_src/generate_clients/tutorial004.js!}
```

////

Это означает, что `item` может быть `int` или `str`.

#### Возможно `None` { #possibly-none }

Вы можете объявить, что значение может иметь определённый тип, например `str`, но также может быть и `None`.

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////

 *  Fix: Gracefully recover from HTTP/2 connection shutdowns at start of request.
 *  Fix: Be lenient if a `MediaType`'s character set is `'single-quoted'`.
 *  Fix: Allow horizontal tab characters in header values.
 *  Fix: When parsing HTTP authentication headers permit challenge parameters in any order.


## Version 3.4.2

_2016-11-03_

    types:
    - note
    - attention
    - caution
    - danger
    - error
    - tip
    - hint
    - warning
    - info
    - check
  pymdownx.blocks.details: null
  pymdownx.blocks.tab:
    alternate_style: true
  mdx_include: null
  markdown_include_variants: null
extra:
  social:
  - icon: fontawesome/brands/github-alt
    link: https://github.com/fastapi/fastapi

Ми можемо завантажити JSON OpenAPI у файл `openapi.json`, а потім **прибрати цей префікс із міткою** за допомогою такого скрипту:

{* ../../docs_src/generate_clients/tutorial004_py310.py *}

//// tab | Node.js

```Javascript
{!> ../../docs_src/generate_clients/tutorial004.js!}
```

////

#### Vielleicht `None` { #possibly-none }

Sie können deklarieren, dass ein Wert einen Typ haben könnte, wie `str`, dass er aber auch `None` sein könnte.

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////

Wir könnten das OpenAPI-JSON in eine Datei `openapi.json` herunterladen und dann mit einem Skript wie dem folgenden **den präfixierten Tag entfernen**:

{* ../../docs_src/generate_clients/tutorial004_py310.py *}

//// tab | Node.js

```Javascript
{!> ../../docs_src/generate_clients/tutorial004.js!}
```

////

Bu, `item`'ın `int` veya `str` olabileceği anlamına gelir.

#### Muhtemelen `None` { #possibly-none }

Bir değerin `str` gibi bir tipi olabileceğini ama aynı zamanda `None` da olabileceğini bildirebilirsiniz.

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////