& ⤴️ 🗻 👈 🔽 ➡.

```Python hl_lines="2-3  22"
{!../../docs_src/wsgi/tutorial001.py!}
```

## ✅ ⚫️

🔜, 🔠 📨 🔽 ➡ `/v1/` 🔜 🍵 🏺 🈸.

& 🎂 🔜 🍵 **FastAPI**.

🚥 👆 🏃 ⚫️ ⏮️ Uvicorn &amp; 🚶 <a href="http://localhost:8000/v1/" class="external-link" target="_blank">http://localhost:8000/v1/</a> 👆 🔜 👀 📨 ⚪️➡️ 🏺:

```txt
Hello, World from Flask!
```

<div class="termy">

```console
$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

For production you would use `fastapi run` instead. 🚀

Internally, **FastAPI CLI** uses <a href="https://www.uvicorn.org" class="external-link" target="_blank">Uvicorn</a>, a high-performance, production-ready, ASGI server. 😎

## `fastapi dev`

Running `fastapi dev` initiates development mode.

### 🌕 📚 FastAPI ✳ - ⚒

* 🌕 **☁** 🛠️ (☁ 🧢).
* ☁ 🐝 📳 🛠️.
* **☁ ✍** 🛠️ & 🛠️ 🇧🇿 🛠️.
* **🏭 🔜** 🐍 🕸 💽 ⚙️ Uvicorn & 🐁.
* 🐍 <a href="https://github.com/fastapi/fastapi" class="external-link" target="_blank">**FastAPI**</a> 👩‍💻:
    * **⏩**: 📶 ↕ 🎭, 🔛 🇷🇪 ⏮️ **✳** &amp; **🚶** (👏 💃 &amp; Pydantic).

👐, ⚫️ ⏪ ➖ ⚙️ "🐩" 📚 🧰. 👉 📉 📉 🛠️, 👆 💪 🎛 Uvicorn 🙆 🎏 🔫 💽 (💖 👸 ⚖️ Hypercorn), ⚖️ 👆 💪 🚮 🔫 🔗 🧰, 💖 `python-socketio`.

///

/// check | "**FastAPI** ⚙️ ⚫️"

🍵 🌐 🐚 🕸 🍕. ❎ ⚒ 🔛 🔝.

🎓 `FastAPI` ⚫️ 😖 🔗 ⚪️➡️ 🎓 `Starlette`.

, 🕳 👈 👆 💪 ⏮️ 💃, 👆 💪 ⚫️ 🔗 ⏮️ **FastAPI**, ⚫️ 🌖 💃 🔛 💊.

///

### <a href="https://www.uvicorn.org/" class="external-link" target="_blank">Uvicorn</a>

そして、これを `FastAPI` appを作る際に使います。

それから、以下のように `OPENAPI_URL` という環境変数を空文字列に設定することによってOpenAPI (UIドキュメントを含む) を無効化することができます。

<div class="termy">

```console
$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

すると、以下のように `/openapi.json`, `/docs`, `/redoc` のどのURLにアクセスしても、 `404 Not Found` エラーが返ってくるようになります。

```JSON
{

        path="docs/en/docs/img/tutorial/separate-openapi-schemas/image01.png"
    )

    # ---------------------
    context.close()
    browser.close()


process = subprocess.Popen(
    ["uvicorn", "docs_src.separate_openapi_schemas.tutorial001:app"]
)
try:
    with sync_playwright() as playwright:
        run(playwright)
finally:

Para produção você usaria `fastapi run` no lugar. 🚀

Internamente, **FastAPI CLI** usa <a href="https://www.uvicorn.org" class="external-link" target="_blank">Uvicorn</a>, um servidor ASGI de alta performance e pronto para produção. 😎

## `fastapi dev`

Quando você roda `fastapi dev`, isso vai executar em modo de desenvolvimento.

## Tente você mesmo

Se seu arquivo for nomeado `main.py`, execute sua aplicação com:

<div class="termy">

```console
$ fastapi dev main.py

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Abra seu navegador em: <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

    page.screenshot(
        path="docs/en/docs/img/tutorial/separate-openapi-schemas/image04.png"
    )
    # ---------------------
    context.close()
    browser.close()


process = subprocess.Popen(
    ["uvicorn", "docs_src.separate_openapi_schemas.tutorial001:app"]
)
try:
    with sync_playwright() as playwright:
        run(playwright)
finally: