/// tip | Tipp

Wenn Sie bereits wissen, was „Umgebungsvariablen“ sind und wie man sie verwendet, können Sie gerne mit dem nächsten Abschnitt weiter unten fortfahren.

///

 *
 * <p>For a {@link Set} whose contents are specified by a {@link Range}, see {@link ContiguousSet}.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/NewCollectionTypesExplained#rangeset">RangeSets</a>.
 *
 * @author Kevin Bourrillion
 * @author Louis Wasserman
 * @since 14.0
 */
@SuppressWarnings("rawtypes") // https://github.com/google/guava/issues/989

/**
 * Static utility methods pertaining to {@code long} primitives, that are not already found in
 * either {@link Long} or {@link Arrays}.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/PrimitivesExplained">primitive utilities</a>.
 *
 * @author Kevin Bourrillion
 * @since 1.0
 */
@GwtCompatible
public final class Longs {
  private Longs() {}

  /**

* `docs/bs/mkdocs.yml`

The `mkdocs.yml` file will have only the following content:

```YAML
INHERIT: ../en/mkdocs.yml
```

The language code would normally be in the <a href="https://en.wikipedia.org/wiki/List_of_ISO_639_language_codes" class="external-link" target="_blank">ISO 639-1 list of language codes</a>.

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Необхідно для підтримки `SessionMiddleware`.
* <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - Необхідно для підтримки Starlette `SchemaGenerator` (ймовірно, вам це не потрібно з FastAPI).

FastAPI / Starlette використовують:

 *   <li>{@link TreeBasedTable}
 *   <li>{@link ArrayTable}
 *   <li>{@link Tables#newCustomTable Tables.newCustomTable}
 * </ul>
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/NewCollectionTypesExplained#table">{@code Table}</a>.
 *
 * @author Jared Levy
 * @param <R> the type of the table row keys
 * @param <C> the type of the table column keys
 * @param <V> the type of the mapped values

////

이 정보는 [가상 환경](virtual-environments.md){.internal-link target=\_blank} 에 대해 알아볼 때 유용할 것입니다.

## 결론

이 문서를 읽고 **환경 변수**가 무엇이고 파이썬에서 어떻게 사용하는지 기본적으로 이해하셨을 겁니다.

또한 <a href="https://ko.wikipedia.org/wiki/환경_변수" class="external-link" target="_blank">환경 변수에 대한 위키피디아(한국어)</a>에서 이에 대해 자세히 알아볼 수 있습니다.

많은 경우에서, 환경 변수가 어떻게 유용하고 적용 가능한지 바로 명확하게 알 수는 없습니다. 하지만 개발할 때 다양한 시나리오에서 계속 나타나므로 이에 대해 아는 것이 좋습니다.

    if (result.equals("/..")) {
      result = "/";
    } else if (result.isEmpty()) {
      result = ".";
    }

    return result;
  }

  /**
   * Returns the <a href="http://en.wikipedia.org/wiki/Filename_extension">file extension</a> for
   * the given file name, or the empty string if the file has no extension. The result does not
   * include the '{@code .}'.
   *

- <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - 需要使用 `SessionMiddleware` 支援時安裝。
- <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - 用於支援 Starlette 的 `SchemaGenerator` (如果你使用 FastAPI，可能不需要它)。

用於 FastAPI / Starlette：

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Obligatoire pour la prise en charge de `SessionMiddleware`.
* <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - Obligatoire pour le support `SchemaGenerator` de Starlette (vous n'en avez probablement pas besoin avec FastAPI).

Utilisées par FastAPI / Starlette :