보통 이렇게 실행할 수 있습니다:

<div class="termy">

```console
$ uvicorn main:app --host 0.0.0.0 --port 8080 --workers 4
<font color="#A6E22E">INFO</font>:     Uvicorn running on <b>http://0.0.0.0:8080</b> (Press CTRL+C to quit)
<font color="#A6E22E">INFO</font>:     Started parent process [<font color="#A1EFE4"><b>27365</b></font>]

    ```

    </div>

=== "Hypercorn"

    <div class="termy">

    ```console
    $ hypercorn main:app --bind 0.0.0.0:80

    Running on 0.0.0.0:8080 over http (CTRL + C to quit)
    ```

    </div>

!!! note
    The command `uvicorn main:app` refers to:

    * `main`: the file `main.py` (the Python "module").

### Return a Response Directly

The most common case would be [returning a Response directly as explained later in the advanced docs](../advanced/response-directly.md){.internal-link target=_blank}.

```Python hl_lines="8  10-11"
{!> ../../../docs_src/response_model/tutorial003_02.py!}
```

This simple case is handled automatically by FastAPI because the return type annotation is the class (or a subclass) of `Response`.

    而 Pydantic 也使用“模型”这个术语 来指代不同的东西，即数据验证、转换以及文档类和实例。

从`database`（来自上面的`database.py`文件）导入`Base`。

创建从它继承的类。

这些类就是 SQLAlchemy 模型。

```Python hl_lines="4  7-8  18-19"
{!../../../docs_src/sql_databases/sql_app/models.py!}
```

这个`__tablename__`属性是用来告诉 SQLAlchemy 要在数据库中为每个模型使用的数据库表的名称。

### 创建模型属性/列

现在创建所有模型（类）属性。

这些属性中的每一个都代表其相应数据库表中的一列。

* ➖ Do not require backports in Python >= 3.7. PR [#1880](https://github.com/tiangolo/fastapi/pull/1880) by [@FFY00](https://github.com/FFY00).

🙆 💼, 👆 🔜 🏃 ⚫️ 💖 👉:

<div class="termy">

```console
$ uvicorn main:app --host 0.0.0.0 --port 8080 --workers 4
<font color="#A6E22E">INFO</font>:     Uvicorn running on <b>http://0.0.0.0:8080</b> (Press CTRL+C to quit)
<font color="#A6E22E">INFO</font>:     Started parent process [<font color="#A1EFE4"><b>27365</b></font>]

    ```

    </div>

=== "Hypercorn"

    <div class="termy">

    ```console
    $ hypercorn main:app --bind 0.0.0.0:80

    Running on 0.0.0.0:8080 over http (CTRL + C to quit)
    ```

    </div>

!!! warning "Achtung"
    Denken Sie daran, die Option `--reload` zu entfernen, wenn Sie diese verwendet haben.

Поэтому это три разных источника:

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

Даже если они все расположены в `localhost`, они используют разные протоколы и порты, а значит, являются разными источниками.

## Шаги

maintainers:
- login: tiangolo
  answers: 1880
  prs: 570
  avatarUrl: https://avatars.githubusercontent.com/u/1326112?u=740f11212a731f56798f558ceddb0bd07642afa7&v=4
  url: https://github.com/tiangolo
experts:
- login: Kludex
  count: 600
  avatarUrl: https://avatars.githubusercontent.com/u/7353520?u=62adc405ef418f4b6c8caa93d3eb8ab107bc4927&v=4
  url: https://github.com/Kludex
- login: dmontagu
  count: 241

Wie auch immer, Sie würden es so ausführen:

<div class="termy">

```console
$ uvicorn main:app --host 0.0.0.0 --port 8080 --workers 4
<font color="#A6E22E">INFO</font>:     Uvicorn running on <b>http://0.0.0.0:8080</b> (Press CTRL+C to quit)
<font color="#A6E22E">INFO</font>:     Started parent process [<font color="#A1EFE4"><b>27365</b></font>]