g=!!a.formUtils.getValue(f),h=!d||e&&e!==d;h&&!g&&a.formUtils.dialogs.removeInputStylingAndMessage(f,c)})};b.find("[data-validation-depends-on]").off("beforeValidation",d).on("beforeValidation",d).each(function(){var c=a(this);b.find('[name="'+c.valAttr("depends-on")+'"]').each(function(){a(this).off("change",f).on("change",f).valAttr("depending-value",c.valAttr("depends-on-value")),this.dependingInputs=this.dependingInputs||[],this.dependingInputs.push(c)})})},c=function(b,c){var d=function(){var ...

Although you use `Depends` in the parameters of your function the same way you use `Body`, `Query`, etc, `Depends` works a bit differently.

You only give `Depends` a single parameter.

This parameter must be something like a function.

You **don't call it** directly (don't add the parenthesis at the end), you just pass it as a parameter to `Depends()`.

And that function takes parameters in the same way that *path operation functions* do.

& ⤴️ ⚫️ 📨 `dict` ⚗ 📚 💲.

### 🗄 `Depends`

{* ../../docs_src/dependencies/tutorial001.py hl[3] *}

### 📣 🔗, "⚓️"

🎏 🌌 👆 ⚙️ `Body`, `Query`, ♒️. ⏮️ 👆 *➡ 🛠️ 🔢* 🔢, ⚙️ `Depends` ⏮️ 🆕 🔢:

{* ../../docs_src/dependencies/tutorial001.py hl[15,20] *}

👐 👆 ⚙️ `Depends` 🔢 👆 🔢 🎏 🌌 👆 ⚙️ `Body`, `Query`, ♒️, `Depends` 👷 👄 🎏.

👆 🕴 🤝 `Depends` 👁 🔢.

👉 🔢 🔜 🕳 💖 🔢.

      TestCharSource okSource = new TestCharSource(STRING);
      assertThrows(IOException.class, () -> okSource.copyTo(new TestCharSink(option)));
      // ensure reader was closed IF it was opened (depends on implementation whether or not it's
      // opened at all if sink.newWriter() throws).
      assertTrue(
          "stream not closed when copying to sink with option: " + option,

   */
  @Override
  public final String toString() {
    byte[] bytes = getBytesInternal();
    StringBuilder sb = new StringBuilder(2 * bytes.length);
    for (byte b : bytes) {
      sb.append(hexDigits[(b >> 4) & 0xf]).append(hexDigits[b & 0xf]);
    }
    return sb.toString();
  }

  private static final char[] hexDigits = "0123456789abcdef".toCharArray();

👉, 👥 🗄 & ⚙️ `Security` ⚪️➡️ `fastapi`.

👆 💪 ⚙️ `Security` 📣 🔗 (💖 `Depends`), ✋️ `Security` 📨 🔢 `scopes` ⏮️ 📇 ↔ (🎻).

👉 💼, 👥 🚶‍♀️ 🔗 🔢 `get_current_active_user` `Security` (🎏 🌌 👥 🔜 ⏮️ `Depends`).

✋️ 👥 🚶‍♀️ `list` ↔, 👉 💼 ⏮️ 1️⃣ ↔: `items` (⚫️ 💪 ✔️ 🌅).

& 🔗 🔢 `get_current_active_user` 💪 📣 🎧-🔗, 🚫 🕴 ⏮️ `Depends` ✋️ ⏮️ `Security`. 📣 🚮 👍 🎧-🔗 🔢 (`get_current_user`), & 🌖 ↔ 📄.

      TestCharSource okSource = new TestCharSource(STRING);
      assertThrows(IOException.class, () -> okSource.copyTo(new TestCharSink(option)));
      // ensure reader was closed IF it was opened (depends on implementation whether or not it's
      // opened at all if sink.newWriter() throws).
      assertTrue(
          "stream not closed when copying to sink with option: " + option,

`Security` ist tatsächlich eine Unterklasse von `Depends` und hat nur noch einen zusätzlichen Parameter, den wir später kennenlernen werden.

Durch die Verwendung von `Security` anstelle von `Depends` weiß **FastAPI** jedoch, dass es Sicherheits-Scopes deklarieren, intern verwenden und die API mit OpenAPI dokumentieren kann.

**FastAPI** 🤙 `CommonQueryParams` 🎓. 👉 ✍ "👐" 👈 🎓 & 👐 🔜 🚶‍♀️ 🔢 `commons` 👆 🔢.

## 🆎 ✍ 🆚 `Depends`

👀 ❔ 👥 ✍ `CommonQueryParams` 🕐 🔛 📟:

```Python
commons: CommonQueryParams = Depends(CommonQueryParams)
```

🏁 `CommonQueryParams`,:

```Python
... = Depends(CommonQueryParams)
```

...⚫️❔ **FastAPI** 🔜 🤙 ⚙️ 💭 ⚫️❔ 🔗.

{* ../../docs_src/security/tutorial002_an_py310.py hl[19:22,26:27] *}

## Внедрение зависимости текущего пользователя

Теперь мы можем использовать тот же `Depends` с нашей зависимостью `get_current_user` в *функции обрабатывающей эндпоинт*:

{* ../../docs_src/security/tutorial002_an_py310.py hl[31] *}