class MySuperContextManager:
    def __init__(self):
        self.db = DBSession()

    def __enter__(self):
        return self.db

    def __exit__(self, exc_type, exc_value, traceback):
        self.db.close()


async def get_db():
    with MySuperContextManager() as db:

def test_traceback_for_dependency_with_yield():
    client = TestClient(app, raise_server_exceptions=True)
    with pytest.raises(ValueError) as exc_info:
        client.get("/dependency-with-yield")
    last_frame = exc_info.traceback[-1]
    assert str(last_frame.path) == __file__

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// Error importing sirius, it's not installed 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// Fehler beim Importieren von sirius, es ist nicht installiert 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// Error importing sirius, it's not installed 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// Erro ao importar o Sirius, ele não está instalado 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// Error importando sirius, no está instalado 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

如果你不去停用 `philosophers-stone` 的虛擬環境，當你在終端中執行 `python` 時，它會嘗試使用 `philosophers-stone` 中的 Python。

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// 匯入 sirius 錯誤，未安裝 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

但如果你停用虛擬環境並啟用 `prisoner-of-askaban` 的新虛擬環境，那麼當你執行 `python` 時，它會使用 `prisoner-of-askaban` 中虛擬環境的 Python。

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// 导入 sirius 报错，它没有安装 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

但是如果你停用虚拟环境并激活 `prisoner-of-askaban` 的新虚拟环境，那么当你运行 `python` 时，它会使用 `prisoner-of-askaban` 中的虚拟环境中的 Python。

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// sirius를 임포트하는 데 실패했습니다. 설치되어 있지 않아요 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>