And the distributed container system with the **load balancer** would **distribute the requests** to each one of the containers with your app **in turns**. So, each request could be handled by one of the multiple **replicated containers** running your app.

participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception
        dep -->> handler: Raise Exception
        handler -->> client: HTTP error response
    end

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Необхідно для підтримки `SessionMiddleware`.

{* ../../docs_src/response_model/tutorial004_py310.py hl[22] *}

and those default values won't be included in the response, only the values actually set.

So, if you send a request to that *path operation* for the item with ID `foo`, the response (not including default values) will be:

```JSON
{
    "name": "Foo",
    "price": 50.2
}
```

/// info

You can also use:

          "interval": "1m",
          "intervalFactor": 2,
          "legendFormat": "{{bucket,api}}",
          "refId": "A"
        }
      ],
      "title": "S3 API Request 4xx Error Rate",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {

participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception
        dep -->> handler: Raise Exception
        handler -->> client: HTTP error response
    end

///

### <a href="https://requests.readthedocs.io" class="external-link" target="_blank">Requests</a>

**FastAPI** aslında **Requests**'in bir alternatifi değil. İkisininde kapsamı oldukça farklı.

Aslında Requests'i bir FastAPI uygulamasının *içinde* kullanmak daha olağan olurdu.

Ama yine de, FastAPI, Requests'ten oldukça ilham aldı.

          <type>boolean</type>
          <defaultValue>false</defaultValue>
          <description>
            <![CDATA[
            Whether this mirror should be blocked from any download request but fail the download process, explaining why.
            <br><b>Default value is</b>: <code>false</code>
            <br><b>Since</b>: Maven 3.8.0
            ]]>
          </description>
        </field>

- <a href="https://jinja.palletsprojects.com" target="_blank"><code>jinja2</code></a> - 使用預設的模板配置時必須安裝。
- <a href="https://github.com/Kludex/python-multipart" target="_blank"><code>python-multipart</code></a> - 需要使用 `request.form()` 對表單進行<abbr title="轉換來自表單的 HTTP 請求到 Python 資料型別"> "解析" </abbr>時安裝。
- <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - 需要使用 `SessionMiddleware` 支援時安裝。

Utilizado pelo FastAPI: