<link>http://jakarta.apache.org/commons/collections/apidocs-COLLECTIONS_3_0/</link>
                <link>http://jakarta.apache.org/commons/dbcp/apidocs/</link>
                <link>http://jakarta.apache.org/commons/fileupload/apidocs/</link>
                <link>http://jakarta.apache.org/commons/httpclient/apidocs/</link>
                <link>http://jakarta.apache.org/commons/logging/apidocs/</link>

**FastAPI** ruft die Klasse `CommonQueryParams` auf. Dadurch wird eine „Instanz“ dieser Klasse erstellt und die Instanz wird als Parameter `commons` an Ihre Funktion überreicht.

## Typannotation vs. `Depends`

Beachten Sie, wie wir `CommonQueryParams` im obigen Code zweimal schreiben:

=== "Python 3.8+"

    ```Python
    commons: Annotated[CommonQueryParams, Depends(CommonQueryParams)]
    ```

=== "Python 3.8+ nicht annotiert"

                <link>http://jakarta.apache.org/commons/collections/apidocs-COLLECTIONS_3_0/</link>
                <link>http://jakarta.apache.org/commons/dbcp/apidocs/</link>
                <link>http://jakarta.apache.org/commons/fileupload/apidocs/</link>
                <link>http://jakarta.apache.org/commons/httpclient/apidocs/</link>
                <link>http://jakarta.apache.org/commons/logging/apidocs/</link>

When you need to use the `common_parameters()` dependency, you have to write the whole parameter with the type annotation and `Depends()`:

```Python
commons: Annotated[dict, Depends(common_parameters)]
```

But because we are using `Annotated`, we can store that `Annotated` value in a variable and use it in multiple places:

=== "Python 3.10+"

## `Annotated`인 의존성 공유하기

위의 예제에서 몇몇 작은 **코드 중복**이 있다는 것을 보았을 겁니다.

`common_parameters()`의존을 사용해야 한다면, 타입 명시와 `Depends()`와 함께 전체 매개변수를 적어야 합니다:

```Python
commons: Annotated[dict, Depends(common_parameters)]
```

하지만 `Annotated`를 사용하고 있기에, `Annotated` 값을 변수에 저장하고 여러 장소에서 사용할 수 있습니다:

=== "Python 3.10+"

    ```Python hl_lines="12  16  21"

org.ow2.asm:asm
org.ow2.asm:asm-analysis
org.ow2.asm:asm-commons
org.ow2.asm:asm-tree
org.ow2.asm:asm-util
ASM: a very small and fast Java bytecode manipulation framework
 Copyright (c) 2000-2011 INRIA, France Telecom
 All rights reserved.

=======================================================================

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warranties regarding its licenses, any material licensed under their

            <link>http://jakarta.apache.org/commons/collections/apidocs-COLLECTIONS_3_0/</link>
            <link>http://jakarta.apache.org/commons/dbcp/apidocs/</link>
            <link>http://jakarta.apache.org/commons/fileupload/apidocs/</link>
            <link>http://jakarta.apache.org/commons/httpclient/apidocs/</link>
            <link>http://jakarta.apache.org/commons/logging/apidocs/</link>

## Аннотация типа или `Depends`

Обратите внимание, что в приведенном выше коде мы два раза пишем `CommonQueryParams`:

=== "Python 3.6+ без Annotated"

    !!! tip "Подсказка"
        Рекомендуется использовать версию с `Annotated` если возможно.

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

    val commonsCodec = "commons-codec:commons-codec"
    val commonsCompress = "org.apache.commons:commons-compress"
    val commonsHttpclient = "org.apache.httpcomponents:httpclient"
    val commonsIo = "commons-io:commons-io"
    val commonsLang = "commons-lang:commons-lang"
    val commonsLang3 = "org.apache.commons:commons-lang3"
    val commonsMath = "org.apache.commons:commons-math3"