`str`을 상속함으로써 API 문서는 값이 `string` 형이어야 하는 것을 알게 되고 이는 문서에 제대로 표시됩니다.

가능한 값들에 해당하는 고정된 값의 클래스 어트리뷰트들을 만듭니다:

{* ../../docs_src/path_params/tutorial005.py hl[1,6:9] *}

/// info | 정보

<a href="https://docs.python.org/3/library/enum.html" class="external-link" target="_blank">열거형(또는 enums)</a>은 파이썬 버전 3.4 이후로 사용 가능합니다.

///

/// tip | 팁

my_user: User = User(id=3, name="John Doe", joined="2018-07-19")

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

/// info

`**second_user_data` یعنی:

کلید ها و مقادیر دیکشنری `second_user_data` را مستقیما به عنوان ارگومان های key-value بفرست، که معادل است با : `User(id=4, name="Mary", joined="2018-11-30")`

///

### پشتیبانی ویرایشگر

	globalTCPOptions        xhttp.TCPOptions
	globalHTTPServerErrorCh = make(chan error)
	globalOSSignalCh        = make(chan os.Signal, 1)

	// global Trace system to send HTTP request/response
	// and Storage/OS calls info to registered listeners.
	globalTrace = pubsub.New[madmin.TraceInfo, madmin.TraceType](8)

	// global Listen system to send S3 API events to registered listeners
	globalHTTPListen = pubsub.New[event.Event, pubsub.Mask](0)

				"application/commonground",
				"application/conference-info+xml",
				"application/cpl+xml",
				"application/csta+xml",
				"application/cstadata+xml",
				"application/cu-seeme",
				"application/cybercash",
				"application/davmount+xml",
				"application/dca-rft",
				"application/dec-dx",
				"application/dialog-info+xml",
				"application/dicom",
				"application/dita+xml",

さらに、いくつかの値を持つクラスのインスタンスを作成すると、その値を検証し、適切な型に変換して（もしそうであれば）全てのデータを持つオブジェクトを提供してくれます。

また、その結果のオブジェクトですべてのエディタのサポートを受けることができます。

Pydanticの公式ドキュメントから引用:

{* ../../docs_src/python_types/tutorial011.py *}


/// info | 情報

Pydanticについてより学びたい方は<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">ドキュメントを参照してください</a>.

///

**FastAPI** はすべてPydanticをベースにしています。

                            <div class="card-body">
                                <div>
                                    <la:info id="msg" message="true">
                                        <div class="alert alert-info">${msg}</div>
                                    </la:info>
                                    <la:errors property="_global"/>
                                </div>
                                <div class="form-group row">

package jcifs.internal.smb2.info;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.nio.charset.StandardCharsets;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;

```

& 🐍 3️⃣.1️⃣0️⃣ & 🔛:

```Python
q: str | None = Query(default=None)
```

...⚒ 🔢 📦, 🎏:

```Python
q: str | None = None
```

✋️ ⚫️ 📣 ⚫️ 🎯 💆‍♂ 🔢 🔢.

/// info

✔️ 🤯 👈 🌅 ⚠ 🍕 ⚒ 🔢 📦 🍕:

```Python
= None
```

⚖️:

```Python
= Query(default=None)
```

⚫️ 🔜 ⚙️ 👈 `None` 🔢 💲, & 👈 🌌 ⚒ 🔢 **🚫 ✔**.

& 👆 🔜 🛎 ❎ 👈 📦 🔗 ⏮️ `pip`, 🖼:

<div class="termy">

```console
$ pip install -r requirements.txt
---> 100%
Successfully installed fastapi pydantic uvicorn
```

</div>

/// info

📤 🎏 📁 &amp; 🧰 🔬 &amp; ❎ 📦 🔗.

👤 🔜 🎦 👆 🖼 ⚙️ 🎶 ⏪ 📄 🔛. 👶

///

### ✍ **FastAPI** 📟

* ✍ `app` 📁 &amp; ⛔ ⚫️.
* ✍ 🛁 📁 `__init__.py`.
* ✍ `main.py` 📁 ⏮️:

pkg go/types, type ArgumentError struct, Index int
pkg go/types, type Config struct, Context *Context
pkg go/types, type Config struct, GoVersion string
pkg go/types, type Context struct
pkg go/types, type Info struct, Instances map[*ast.Ident]Instance
pkg go/types, type Instance struct
pkg go/types, type Instance struct, Type Type
pkg go/types, type Instance struct, TypeArgs *TypeList
pkg go/types, type Term struct