# 第一步

最簡單的 FastAPI 檔案可能看起來像這樣：

{* ../../docs_src/first_steps/tutorial001.py *}

將其複製到一個名為 `main.py` 的文件中。

執行即時重新載入伺服器（live server）：

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

🖼, 👆 💪 ✔️ 📁 `config.py` ⏮️:

{* ../../docs_src/settings/app01/config.py *}

& ⤴️ ⚙️ ⚫️ 📁 `main.py`:

{* ../../docs_src/settings/app01/main.py hl[3,11:13] *}

/// tip

👆 🔜 💪 📁 `__init__.py` 👆 👀 🔛 [🦏 🈸 - 💗 📁](../tutorial/bigger-applications.md){.internal-link target=_blank}.

///

## ⚒ 🔗

## 🗄 ➡

🥇, 🗄 `Path` ⚪️➡️ `fastapi`:

{* ../../docs_src/path_params_numeric_validations/tutorial001.py hl[3] *}

## 📣 🗃

👆 💪 📣 🌐 🎏 🔢 `Query`.

🖼, 📣 `title` 🗃 💲 ➡ 🔢 `item_id` 👆 💪 🆎:

{* ../../docs_src/path_params_numeric_validations/tutorial001.py hl[10] *}

/// note

➡ 🔢 🕧 ✔ ⚫️ ✔️ 🍕 ➡.

, 👆 🔜 📣 ⚫️ ⏮️ `...` ™ ⚫️ ✔.

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

////

//// tab | Python 3.8+

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial009.py!}
```

////

//// tab | Python 3.8+ alternative

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial009b.py!}
```

////

{* ../../docs_src/first_steps/tutorial001.py *}

Copia eso en un archivo `main.py`.

Ejecuta el servidor en vivo:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

{* ../../docs_src/websockets/tutorial001.py hl[48:52] *}

Вы можете получать и отправлять двоичные, текстовые и JSON данные.

## Проверка в действии

Если ваш файл называется `main.py`, то запустите приложение командой:

<div class="termy">

```console
$ fastapi dev main.py

{* ../../docs_src/response_model/tutorial003_py310.py hl[9,11,16] *}

Here, even though our *path operation function* is returning the same input user that contains the password:

{* ../../docs_src/response_model/tutorial003_py310.py hl[24] *}

...we declared the `response_model` to be our model `UserOut`, that doesn't include the password:

{* ../../docs_src/response_model/tutorial003_py310.py hl[22] *}

{* ../../docs_src/response_model/tutorial003_py310.py hl[9,11,16] *}

Aqui, embora nossa *função de operação de rota* esteja retornando o mesmo usuário de entrada que contém a senha:

{* ../../docs_src/response_model/tutorial003_py310.py hl[24] *}

...declaramos o `response_model` como nosso modelo `UserOut`, que não inclui a senha:

{* ../../docs_src/response_model/tutorial003_py310.py hl[22] *}

{* ../../docs_src/response_model/tutorial003_py310.py hl[9,11,16] *}

Obwohl unsere *Pfadoperation-Funktion* hier denselben `user` von der Eingabe zurückgibt, der das Passwort enthält:

{* ../../docs_src/response_model/tutorial003_py310.py hl[24] *}

... haben wir deklariert, dass `response_model` das Modell `UserOut` ist, welches das Passwort nicht enthält:

{* ../../docs_src/security/tutorial002.py hl[25] *}

## 🤚 👩‍💻

`get_current_user` 🔜 ⚙️ (❌) 🚙 🔢 👥 ✍, 👈 ✊ 🤝 `str` & 📨 👆 Pydantic `User` 🏷:

{* ../../docs_src/security/tutorial002.py hl[19:22,26:27] *}

## 💉 ⏮️ 👩‍💻

🔜 👥 💪 ⚙️ 🎏 `Depends` ⏮️ 👆 `get_current_user` *➡ 🛠️*:

{* ../../docs_src/security/tutorial002.py hl[31] *}

👀 👈 👥 📣 🆎 `current_user` Pydantic 🏷 `User`.