mean += (value - mean) / (index + 1);
      } else {
        mean = calculateNewMeanNonFinite(mean, value);
      }
    }
    return mean;
  }

  /**
   * Returns the <a href="http://en.wikipedia.org/wiki/Arithmetic_mean">arithmetic mean</a> of the
   * values. The count must be non-zero.
   *
   * <p>The definition of the mean is the same as {@link Stats#mean}.
   *

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
      and distribution as defined by Sections 1 through 9 of this document.

      "Licensor" shall mean the copyright owner or entity authorized by
      the copyright owner that is granting the License.

      "Legal Entity" shall mean the union of the acting entity and all

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
      and distribution as defined by Sections 1 through 9 of this document.

      "Licensor" shall mean the copyright owner or entity authorized by
      the copyright owner that is granting the License.

      "Legal Entity" shall mean the union of the acting entity and all

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.

"License" shall mean the terms and conditions for use, reproduction, and
distribution as defined by Sections 1 through 9 of this document.

"Licensor" shall mean the copyright owner or entity authorized by the copyright
owner that is granting the License.

"Legal Entity" shall mean the union of the acting entity and all other entities

```

</div>

/// note | Nota

O comando `uvicorn main:app` refere-se a:

* `main`: o arquivo `main.py` (o "módulo" Python).
* `app`: o objeto criado dentro de `main.py` com a linha `app = FastAPI()`.

É equivalente a:

```Python
from main import app
```

///

    # o generateOutputDirectory: (NotRequired - Default Java:'../src/main/java' CSharp:'../source')
    #  The base output directory for generating.
    #  Basically you don't need to specify this if the project style is as follows:
    #
    #   *Java Project Style
    #     If this value is '../src/main/java' and your project is under the Maven,
    #     you don't need to set up this property!
    #

它也被設計成可作為未來的參考，讓你隨時回來查看所需的內容。

## 運行程式碼

所有程式碼區塊都可以直接複製和使用（它們實際上是經過測試的 Python 檔案）。

要運行任何範例，請將程式碼複製到 `main.py` 檔案，並使用以下命令啟動 `fastapi dev`：

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

      count++;
      if (isFinite(value) && isFinite(mean)) {
        // Art of Computer Programming vol. 2, Knuth, 4.2.2, (15) and (16)
        double delta = value - mean;
        mean += delta / count;
        sumOfSquaresOfDeltas += delta * (value - mean);
      } else {
        mean = calculateNewMeanNonFinite(mean, value);
        sumOfSquaresOfDeltas = NaN;
      }
      min = Math.min(min, value);
      max = Math.max(max, value);
    }

		<fileSet>
			<filtered>true</filtered>
			<directory>src/main/assemblies/files</directory>
			<outputDirectory>fess-${project.version}/bin</outputDirectory>
			<lineEnding>dos</lineEnding>
			<includes>
				<include>fess.in.bat</include>
				<include>fess.bat</include>
				<include>service.bat</include>
			</includes>
		</fileSet>
		<fileSet>
			<directory>src/main/assemblies/extension</directory>

<div class="termy">

```console
// اینجا هنوز متغیر محیطی رو تنظیم نکردیم
$ python main.py

// چون متغیر محیطی رو تنظیم نکردیم، مقدار پیش‌فرض رو می‌گیریم

Hello World from Python

// ولی اگه اول یه متغیر محیطی بسازیم
$ export MY_NAME="Wade Wilson"

// و بعد دوباره برنامه رو صدا کنیم
$ python main.py

// حالا می‌تونه متغیر محیطی رو بخونه

Hello Wade Wilson from Python
```

</div>