Docker Hubは 多くのツールや環境、データベース、アプリケーションに対応している予め作成された**公式のコンテナ・イメージ**をパブリックに提供しています。

例えば、公式イメージの1つに<a href="https://hub.docker.com/_/python" class="external-link" target="_blank">Python Image</a>があります。

その他にも、データベースなどさまざまなイメージがあります：

* <a href="https://hub.docker.com/_/postgres" class="external-link" target="_blank">PostgreSQL</a>

    this.element = Preconditions.checkNotNull(element);
  }

  @Override
  public int size() {
    return 1;
  }

  @Override
  public boolean contains(@CheckForNull Object target) {
    return element.equals(target);
  }

  @Override
  public UnmodifiableIterator<E> iterator() {
    return singletonIterator(element);
  }

  @Override
  public ImmutableList<E> asList() {

/// info

To receive uploaded files and/or form data, first install <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install python-multipart
```

///

## Import `File` and `Form`

                + ", cronExpression=" + cronExpression + ", jobLogging=" + jobLogging + ", name=" + name + ", scriptData=" + scriptData
                + ", scriptType=" + scriptType + ", sortOrder=" + sortOrder + ", target=" + target + ", updatedBy=" + updatedBy
                + ", updatedTime=" + updatedTime + ", docMeta=" + docMeta + "]";
    }

    this.element = Preconditions.checkNotNull(element);
  }

  @Override
  public int size() {
    return 1;
  }

  @Override
  public boolean contains(@CheckForNull Object target) {
    return element.equals(target);
  }

  @Override
  public UnmodifiableIterator<E> iterator() {
    return singletonIterator(element);
  }

  @Override
  public ImmutableList<E> asList() {

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Outer class that exists solely to let us write {@code Partially.GwtIncompatible} instead of plain
 * {@code GwtIncompatible}. This is more accurate for {@link Futures#catching}, which is available

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * The presence of this annotation on an API indicates that the method may not be used with
 * the <a href="http://www.gwtproject.org/">Google Web Toolkit</a> (GWT).
 *

  // is not namespaced or the request targets all namespaces).
  // If this field is omitted or false then the `namespaces` field
  // must contain a non-empty list.
  // +optional
  optional bool clusterScope = 4;

  // `namespaces` is a list of target namespaces that restricts
  // matches.  A request that specifies a target namespace matches

/// info

Alternativ kann `status_code` auch ein `IntEnum` erhalten, so wie Pythons <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a>.

///

Das wird:

* Diesen Statuscode mit der Response zurücksenden.
* Ihn als solchen im OpenAPI-Schema dokumentieren (und somit in den Benutzeroberflächen):

/// info | "Информация"

В качестве значения параметра `status_code` также может использоваться `IntEnum`, например, из библиотеки <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a> в Python.

///

Это позволит:

* Возвращать указанный код статуса в ответе.
* Документировать его как код статуса ответа в OpenAPI схеме (а значит, и в пользовательском интерфейсе):