```

... rend le paramètre optionnel, et est donc équivalent à :

```Python
q: Union[str, None] = None
```

Mais déclare explicitement `q` comme étant un paramètre de requête.

/// info

Gardez à l'esprit que la partie la plus importante pour rendre un paramètre optionnel est :

```Python
= None
```

ou :

```Python
= Query(None)
```

th{border-color:#8fd19e}.table-hover .table-success:hover{background-color:#b1dfbb}.table-hover .table-success:hover>td,.table-hover .table-success:hover>th{background-color:#b1dfbb}.table-info,.table-info>td,.table-info>th{background-color:#bee5eb}.table-info tbody+tbody,.table-info td,.table-info th,.table-info thead th{border-color:#86cfda}.table-hover .table-info:hover{background-color:#abdde5}.table-hover .table-info:hover>td,.table-hover .table-info:hover>th{background-color:#abdde5}.table-w...

Lancez le serveur avec :

<div class="termy">

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">

### 運行

使用以下指令運行伺服器：

<div class="termy">

```console
$ uvicorn main:app --reload

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">

```

### ✅ 🏧 🛠️ 🩺

🔜, 🏃 `uvicorn` ⏮️ 👑 📱, 🚥 👆 📁 `main.py`, ⚫️ 🔜:

<div class="termy">

```console
$ uvicorn main:app --reload

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

</div>

&amp; 📂 🩺 <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

### 🏗 🗄 🔗

⤴️, ⚙️ 🎏 🚙 🔢 🏗 🗄 🔗, 🔘 `custom_openapi()` 🔢:

```Python hl_lines="2  15-20"
{!../../docs_src/extending_openapi/tutorial001.py!}
```

### 🔀 🗄 🔗

🔜 👆 💪 🚮 📄 ↔, ❎ 🛃 `x-logo` `info` "🎚" 🗄 🔗:

```Python hl_lines="21-23"
{!../../docs_src/extending_openapi/tutorial001.py!}
```

### 💾 🗄 🔗

👆 💪 ⚙️ 🏠 `.openapi_schema` "💾", 🏪 👆 🏗 🔗.

@needs_py39
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/files/": {
                "post": {
                    "summary": "Create File",
                    "operationId": "create_file_files__post",

        super.document1_CallableSuperMethod();
    }

    // ===================================================================================
    //                                                                           User Info
    //                                                                           =========
    @Override
    protected OptionalThing<LoginManager> myLoginManager() {
        return OptionalThing.of(fessLoginAssist);
    }

				<p class="login-box-msg">
					<la:message key="labels.login" />
				</p>
				<%-- Message --%>
				<div>
					<la:info id="msg" message="false">
						<div class="alert alert-info">${msg}</div>
					</la:info>
					<la:errors />
				</div>
				<la:form styleId="login" method="post">
					<div class="input-group mb-3">
						<c:set var="ph_username">

				<p class="login-box-msg">
					<la:message key="labels.login.newpassword" />
				</p>
				<%-- Message --%>
				<div>
					<la:info id="msg" message="false">
						<div class="alert alert-info">${msg}</div>
					</la:info>
					<la:errors />
				</div>
				<la:form styleId="newPassword" method="post">
					<div class="input-group mb-3">
						<c:set var="ph_new_password">