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  2. github.com/tiangolo/fastapi

    docs/zh/docs/tutorial/handling-errors.md 

    ```

### 触发 `HTTPException`

`HTTPException` 是额外包含了和 API 有关数据的常规 Python 异常。

因为是 Python 异常，所以不能 `return`，只能 `raise`。

如在调用*路径操作函数*里的工具函数时，触发了 `HTTPException`，FastAPI 就不再继续执行*路径操作函数*中的后续代码，而是立即终止请求，并把 `HTTPException` 的 HTTP 错误发送至客户端。

在介绍依赖项与安全的章节中，您可以了解更多用 `raise` 异常代替 `return` 值的优势。

本例中，客户端用 `ID` 请求的 `item` 不存在时，触发状态码为 `404` 的异常：

```Python hl_lines="11"
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  3. github.com/tiangolo/fastapi

    docs/em/docs/tutorial/dependencies/dependencies-in-path-operation-decorators.md 

    👆 💪 ⚙️ 🎏 🔗 *🔢* 👆 ⚙️ 🛎.

### 🔗 📄

👫 💪 📣 📨 📄 (💖 🎚) ⚖️ 🎏 🎧-🔗:

```Python hl_lines="6  11"
{!../../../docs_src/dependencies/tutorial006.py!}
```

### 🤚 ⚠

👫 🔗 💪 `raise` ⚠, 🎏 😐 🔗:

```Python hl_lines="8  13"
{!../../../docs_src/dependencies/tutorial006.py!}
```

### 📨 💲

& 👫 💪 📨 💲 ⚖️ 🚫, 💲 🏆 🚫 ⚙️.
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  4. github.com/tiangolo/fastapi

    docs/ko/docs/tutorial/dependencies/dependencies-in-path-operation-decorators.md 

        !!! tip "팁"
        가능하다면 `Annotated`가 달린 버전을 권장합니다.

    ```Python hl_lines="6  11"
    {!> ../../../docs_src/dependencies/tutorial006.py!}
    ```

### 오류 발생시키기

다음 의존성은 기존 의존성과 동일하게 예외를 `raise`를 일으킬 수 있습니다:

=== "Python 3.9+"

    ```Python hl_lines="10  15"
    {!> ../../../docs_src/dependencies/tutorial006_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="9  14"
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  5. github.com/tiangolo/fastapi

    docs/em/docs/advanced/security/oauth2-scopes.md 

    `security_scopes` 🎚 (🎓 `SecurityScopes`) 🚚 `scope_str` 🔢 ⏮️ 👁 🎻, 🔌 👈 ↔ 👽 🚀 (👥 🔜 ⚙️ ⚫️).

👥 ✍ `HTTPException` 👈 👥 💪 🏤-⚙️ (`raise`) ⏪ 📚 ☝.

👉 ⚠, 👥 🔌 ↔ 🚚 (🚥 🙆) 🎻 👽 🚀 (⚙️ `scope_str`). 👥 🚮 👈 🎻 ⚗ ↔ `WWW-Authenticate` 🎚 (👉 🍕 🔌).

```Python hl_lines="105  107-115"
{!../../../docs_src/security/tutorial005.py!}
```
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  6. github.com/tiangolo/fastapi

    docs/em/docs/contributing.md 

    ▶️ ✍ 👑 📃, `docs/ht/index.md`.

⤴️ 👆 💪 😣 ⏮️ ⏮️ 👩‍🌾, "♻ 🇪🇸".

##### 🆕 🇪🇸 🚫 🐕‍🦺

🚥 🕐❔ 🏃‍♂ 🖖 💽 ✍ 👆 🤚 ❌ 🔃 🇪🇸 🚫 ➖ 🐕‍🦺, 🕳 💖:

```
 raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: partials/language/xx.html
```

👈 ⛓ 👈 🎢 🚫 🐕‍🦺 👈 🇪🇸 (👉 💼, ⏮️ ❌ 2️⃣-🔤 📟 `xx`).

✋️ 🚫 😟, 👆 💪 ⚒ 🎢 🇪🇸 🇪🇸 & ⤴️ 💬 🎚 🩺.
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  7. github.com/tiangolo/fastapi

    tests/test_tutorial/test_websockets/test_tutorial002_an_py39.py 

        client = TestClient(app)
    with pytest.raises(WebSocketDisconnect):
        with client.websocket_connect("/items/foo/ws"):
            pytest.fail(
                "did not raise WebSocketDisconnect on __enter__"
            )  # pragma: no cover


@needs_py39
def test_websocket_invalid_data(app: FastAPI):
    client = TestClient(app)
    with pytest.raises(WebSocketDisconnect):
    Python
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  8. github.com/tiangolo/fastapi

    docs/fr/docs/async.md 

    Donc pour équilibrer tout ça, imaginez l'histoire suivante :

> Vous devez nettoyer une grande et sale maison.

*Oui, c'est toute l'histoire*.

---

Il n'y a plus d'attente 🕙 nulle part, juste beaucoup de travail à effectuer, dans différentes pièces de la maison.
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  9. github.com/tiangolo/fastapi

    tests/test_ws_router.py 

            try:
            return await call_next()
        except Exception as e:  # pragma: no cover
            caught.append(e)
            raise

    myapp = make_app(middleware=[Middleware(catcher)])

    client = TestClient(myapp)
    with pytest.raises(WebSocketDisconnect) as e:
        with client.websocket_connect("/depends-validate/"):
            pass  # pragma: no cover
    Python
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  10. github.com/tiangolo/fastapi

    tests/test_tutorial/test_websockets/test_tutorial001.py 

    
def test_main():
    response = client.get("/")
    assert response.status_code == 200, response.text
    assert b"<!DOCTYPE html>" in response.content


def test_websocket():
    with pytest.raises(WebSocketDisconnect):
        with client.websocket_connect("/ws") as websocket:
            message = "Message one"
            websocket.send_text(message)
            data = websocket.receive_text()
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  11. github.com/tiangolo/fastapi

    LICENSE 

    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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