* Credenciais (Cabeçalhos de autorização, Cookies, etc).
* Métodos HTTP específicos (`POST`, `PUT`) ou todos eles com o curinga `"*"`.
* Cabeçalhos HTTP específicos ou todos eles com o curinga `"*"`.

```Python hl_lines="2  6-11  13-19"
{!../../docs_src/cors/tutorial001.py!}
```

Je kunt omgevingsvariabelen **buiten** Python aanmaken, in de terminal (of met een andere methode) en ze vervolgens **in Python uitlezen**.

Je kunt bijvoorbeeld een bestand `main.py` hebben met:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

You could also create environment variables **outside** of Python, in the terminal (or with any other method), and then **read them in Python**.

For example you could have a file `main.py` with:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

`await`가 동작하기 위해, 이것은 비동기를 지원하는 함수 내부에 있어야 합니다. 이를 위해서 함수를 `async def`를 사용해 정의하기만 하면 됩니다:

```Python hl_lines="1"
async def get_burgers(number: int):
    # Do some asynchronous stuff to create the burgers
    return burgers
```

...`def`를 사용하는 대신:

```Python hl_lines="2"
# This is not asynchronous
def get_sequential_burgers(number: int):
    # Do some sequential stuff to create the burgers

その場合、**FastAPI**はそれを構築するためのツールも提供します。

///

`OAuth2PasswordBearer` クラスのインスタンスを作成する時に、パラメーター`tokenUrl`を渡します。このパラメーターには、クライアント (ユーザーのブラウザで動作するフロントエンド) がトークンを取得するために`ユーザー名`と`パスワード`を送信するURLを指定します。

```Python hl_lines="6"
{!../../docs_src/security/tutorial001.py!}
```

/// tip | "豆知識"

ここで、`tokenUrl="token"`は、まだ作成していない相対URL`token`を指します。相対URLなので、`./token`と同じです。

```

<details markdown="1">
<summary>Или используйте <code>async def</code>...</summary>

Если ваш код использует `async` / `await`, используйте `async def`:

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")

* Credentials (Authorization headers, Cookies, etc).
* Specific HTTP methods (`POST`, `PUT`) or all of them with the wildcard `"*"`.
* Specific HTTP headers or all of them with the wildcard `"*"`.

```Python hl_lines="2  6-11  13-19"
{!../../docs_src/cors/tutorial001.py!}
```

```

<details markdown="1">
<summary>Hoặc sử dụng <code>async def</code>...</summary>

Nếu code của bạn sử dụng `async` / `await`, hãy sử dụng `async def`:

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")

    return {"item_id": item_id, "q": q}
```

<details markdown="1">
<summary>或者使用 <code>async def</code>...</summary>

如果你的代码里会出现 `async` / `await`，请使用 `async def`：

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")

```

<details markdown="1">
<summary>Və ya <code>async def</code>...</summary>

Əgər kodunuzda `async` və ya `await` vardırsa `async def` istifadə edə bilərik:

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")