```Python
from .dependencies import get_token_header
```

würde bedeuten:

* Beginnend im selben Package, in dem sich dieses Modul (die Datei `app/routers/items.py`) befindet (das Verzeichnis `app/routers/`) ...
* finde das Modul `dependencies` (eine imaginäre Datei unter `app/routers/dependencies.py`) ...
* und importiere daraus die Funktion `get_token_header`.

    🚥 👆 💭 👌 ❔ 🗄 👷, 😣 ⏭ 📄 🔛.

👁 ❣ `.`, 💖:

```Python
from .dependencies import get_token_header
```

🔜 ⛓:

* ▶️ 🎏 📦 👈 👉 🕹 (📁 `app/routers/items.py`) 🖖 (📁 `app/routers/`)...
* 🔎 🕹 `dependencies` (👽 📁 `app/routers/dependencies.py`)...
*  & ⚪️➡️ ⚫️, 🗄 🔢 `get_token_header`.

✋️ 👈 📁 🚫 🔀, 👆 🔗 📁 `app/dependencies.py`.

💭 ❔ 👆 📱/📁 📊 👀 💖:

```Python
from .dependencies import get_token_header
```

would mean:

* Starting in the same package that this module (the file `app/routers/items.py`) lives in (the directory `app/routers/`)...
* find the module `dependencies` (an imaginary file at `app/routers/dependencies.py`)...
* and from it, import the function `get_token_header`.

```Python
from ..dependencies import get_token_header
```

表示：

* 从该模块（`app/routers/items.py` 文件）所在的同一个包（`app/routers/` 目录）开始...
* 跳转到其父包（`app/` 目录）...
* 在该父包中，找到 `dependencies` 模块（位于 `app/dependencies.py` 的文件）...
* 然后从中导入函数 `get_token_header`。

正常工作了！🎉

---

同样，如果我们使用了三个点 `...`，例如：

```Python
from ...dependencies import get_token_header
```

那将意味着：