auto* cell2 = TFE_MonitoringGetCellStringGauge2(gauge2, "foo", "bar");
  TFE_MonitoringStringGaugeCellSet(cell2, "str");
  auto* buf = new TF_Buffer;
  TFE_MonitoringStringGaugeCellValue(cell2, buf);
  string data(static_cast<const char*>(buf->data), buf->length);
  TF_DeleteBuffer(buf);
  EXPECT_EQ(data, "str");
  TFE_MonitoringDeleteStringGauge2(gauge2);
  TF_DeleteStatus(status);
}

TEST(CAPI, MonitoringSampler0) {

```JSON
{
  "detail": "Item not found"
}
```

/// tip | "Tipp"

Wenn Sie eine `HTTPException` auslösen, können Sie dem Parameter `detail` jeden Wert übergeben, der nach JSON konvertiert werden kann, nicht nur `str`.

Zum Beispiel ein `dict`, eine `list`, usw.

Das wird automatisch von **FastAPI** gehandhabt und der Wert nach JSON konvertiert.

///

## Benutzerdefinierte Header hinzufügen

```JSON
{
  "detail": "Item not found"
}
```

/// tip

🕐❔ 🙋‍♀ `HTTPException`, 👆 💪 🚶‍♀️ 🙆 💲 👈 💪 🗜 🎻 🔢 `detail`, 🚫 🕴 `str`.

👆 💪 🚶‍♀️ `dict`, `list`, ♒️.

👫 🍵 🔁 **FastAPI** & 🗜 🎻.

///

## 🚮 🛃 🎚

📤 ⚠ 🌐❔ ⚫️ ⚠ 💪 🚮 🛃 🎚 🇺🇸🔍 ❌. 🖼, 🆎 💂‍♂.

👆 🎲 🏆 🚫 💪 ⚙️ ⚫️ 🔗 👆 📟.

  - Tutorial - User Guide:
    - tutorial/index.md
    - tutorial/first-steps.md
    - tutorial/path-params.md
    - tutorial/query-params.md
    - tutorial/body.md
    - tutorial/query-params-str-validations.md
    - tutorial/path-params-numeric-validations.md
    - tutorial/query-param-models.md
    - tutorial/body-multiple-params.md
    - tutorial/body-fields.md
    - tutorial/body-nested-models.md

Isso significa que **qualquer valor** lido em Python de uma variável de ambiente **será uma `str`**, e qualquer conversão para um tipo diferente ou qualquer validação precisa ser feita no código.

### ⏲ ➡ 🧬

⏲ *➡* 💪 ✔️ <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#key-expression" class="external-link" target="_blank">🗄 3️⃣ 🧬</a> 👈 💪 🔌 🍕 ⏮️ 📨 📨 *👆 🛠️*.

👉 💼, ⚫️ `str`:

```Python
"{$callback_url}/invoices/{$request.body.id}"
```

, 🚥 👆 🛠️ 👩‍💻 (🔢 👩‍💻) 📨 📨 *👆 🛠️* :

```
https://yourapi.com/invoices/?callback_url=https://www.external.org/events
```

{modifiers~offset}\n * @private\n * @argument {String} str - Value + unit string\n * @argument {String} measurement - `height` or `width`\n * @argument {Object} popperOffsets\n * @argument {Object} referenceOffsets\n * @returns {Number|String}\n * Value in pixels, or original string if no values were extracted\n */\nexport function toValue(str, measurement, popperOffsets, referenceOffsets) {\n  // separate value from unit\n  const split = str.match(/((?:\\-|\\+)?\\d*\\.?\\d*)(.*)/);\n  const value...

}

// FromInt creates a Value from an int
func FromInt(f int64) *Value {
	return &Value{value: f}
}

// FromString creates a Value from a string
func FromString(str string) *Value {
	return &Value{value: str}
}

// FromBool creates a Value from a bool
func FromBool(b bool) *Value {
	return &Value{value: b}
}

// FromTimestamp creates a Value from a timestamp

///

### 🔁 5️⃣: 📨 🎚

```Python hl_lines="8"
{!../../docs_src/first_steps/tutorial001.py!}
```

👆 💪 📨 `dict`, `list`, ⭐ 💲 `str`, `int`, ♒️.

👆 💪 📨 Pydantic 🏷 (👆 🔜 👀 🌅 🔃 👈 ⏪).

📤 📚 🎏 🎚 & 🏷 👈 🔜 🔁 🗜 🎻 (🔌 🐜, ♒️). 🔄 ⚙️ 👆 💕 🕐, ⚫️ 🏆 🎲 👈 👫 ⏪ 🐕‍🦺.

## 🌃

* 🗄 `FastAPI`.
* ✍ `app` 👐.

Это означает, что **любое значение**, считанное в Python из переменной окружения, **будет `str`**, и любое преобразование к другому типу или любая проверка должны быть выполнены в коде.