from typing import Dict, List, Tuple

import pytest
from fastapi import FastAPI
from pydantic import BaseModel


def test_invalid_sequence():
    with pytest.raises(AssertionError):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/{id}")
        def read_items(id: List[Item]):
            pass  # pragma: no cover


def test_invalid_tuple():

import pytest
from fastapi import FastAPI, Query
from pydantic import BaseModel


def test_invalid_sequence():
    with pytest.raises(AssertionError):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/")
        def read_items(q: List[Item] = Query(default=None)):
            pass  # pragma: no cover


def test_invalid_tuple():

from typing import List, Tuple

from fastapi import Depends, FastAPI, Security
from fastapi.security import SecurityScopes
from fastapi.testclient import TestClient

app = FastAPI()


def get_user(required_scopes: SecurityScopes):
    return "john", required_scopes.scopes


def get_user_override(required_scopes: SecurityScopes):
    return "alice", required_scopes.scopes


def get_data():
    return [1, 2, 3]

edit_uri: ''
plugins:
  search: null
  macros:
    include_yaml:
    - external_links: ../en/data/external_links.yml
    - github_sponsors: ../en/data/github_sponsors.yml
    - people: ../en/data/people.yml
    - sponsors_badge: ../en/data/sponsors_badge.yml
    - sponsors: ../en/data/sponsors.yml
  redirects:
    redirect_maps:
      deployment/deta.md: deployment/cloud.md

    聊天室仅供闲聊。

### 别在聊天室里提问

注意，聊天室更倾向于“闲聊”，经常有人会提出一些笼统得让人难以回答的问题，所以在这里提问一般没人回答。

GitHub Issues 里提供了模板，指引您提出正确的问题，有利于获得优质的回答，甚至可能解决您还没有想到的问题。而且就算答疑解惑要耗费不少时间，我还是会尽量在 GitHub 里回答问题。但在聊天室里，我就没功夫这么做了。😅

#### 🔢 & ⚒

👆 🔜 🎏 📣 `tuple`Ⓜ & `set`Ⓜ:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial007.py!}
    ```

=== "🐍 3️⃣.9️⃣ & 🔛"

    ```Python hl_lines="1"
    {!> ../../../docs_src/python_types/tutorial007_py39.py!}
    ```

👉 ⛓:

* 🔢 `items_t` `tuple` ⏮️ 3️⃣ 🏬, `int`, ➕1️⃣ `int`, & `str`.

## Future

By this point, it's already clear that **FastAPI** with its ideas is being useful for many people.

It is being chosen over previous alternatives for suiting many use cases better.

Many developers and teams already depend on **FastAPI** for their projects (including me and my team).

📚 💼 👆 5️⃣📆 ⏪ 💭 ❔ 📚 ❔. 👶

🚥 👆 🤝 📚 👫👫 ⏮️ 👫 ❔, 👆 🔜 ▶️️ 🛂 [FastAPI 🕴](fastapi-people.md#_2){.internal-link target=_blank}. 👶

💭, 🏆 ⚠ ☝: 🔄 😇. 👫👫 👟 ⏮️ 👫 😩 & 📚 💼 🚫 💭 🏆 🌌, ✋️ 🔄 🏆 👆 💪 😇. 👶

💭 **FastAPI** 👪 😇 & 👍. 🎏 🕰, 🚫 🚫 🎭 ⚖️ 😛 🎭 ⤵ 🎏. 👥 ✔️ ✊ 💅 🔠 🎏.

---

    ```

As in this case (without using `Annotated`) we have to replace the default value `None` in the function with `Query()`, we now need to set the default value with the parameter `Query(default=None)`, it serves the same purpose of defining that default value (at least for FastAPI).

So:

```Python
q: Union[str, None] = Query(default=None)
```

...makes the parameter optional, with a default value of `None`, the same as:

### typing의 `List` 임포트

먼저, 파이썬 표준 `typing` 모듈에서 `List`를 임포트합니다:

```Python hl_lines="1"
{!../../../docs_src/body_nested_models/tutorial002.py!}
```

### 타입 매개변수로 `List` 선언

`list`, `dict`, `tuple`과 같은 타입 매개변수(내부 타입)를 갖는 타입을 선언하려면:

* `typing` 모듈에서 임포트
* 대괄호를 사용하여 "타입 매개변수"로 내부 타입 전달: `[` 및 `]`

```Python
from typing import List

my_list: List[str]
```

이 모든 것은 타입 선언을 위한 표준 파이썬 문법입니다.