westus2.azurestaticapps.net
wf
whitesnow.jp
whm.fr-par.scw.cloud
whm.nl-ams.scw.cloud
whoswho
wi.us
wielun.pl
wien
wien.funkfeuer.at
wif.gov.pl
wiih.gov.pl
wiki
wiki.bo
wiki.br
williamhill
win
winb.gov.pl
windows
wine
winners
wios.gov.pl
witd.gov.pl
withgoogle.com
withyoutube.com
wiw.gov.pl
wix.run
wixsite.com

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Обязательно, для поддержки `SessionMiddleware`.
* <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - Обязательно, для поддержки `SchemaGenerator` Starlette (возможно, вам это не нужно с FastAPI).

Используется FastAPI / Starlette:

- <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - `SessionMiddleware` সহায়তার জন্য প্রয়োজন।
- <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - স্টারলেটের SchemaGenerator সাপোর্ট এর জন্য প্রয়োজন (আপনার সম্ভাবত FastAPI প্রয়োজন নেই)।

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Követelmény `SessionMiddleware` támogatáshoz.
* <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - Követelmény a Starlette `SchemaGenerator`-ának támogatásához (valószínűleg erre nincs szükség FastAPI használása esetén).

FastAPI / Starlette által használt

/**
 * A {@link List} whose contents will never change, with many other important properties detailed at
 * {@link ImmutableCollection}.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @see ImmutableMap
 * @see ImmutableSet
 * @author Kevin Bourrillion
 * @since 2.0
 */
@GwtCompatible

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Bắt buộc để hỗ trợ `SessionMiddleware`.
* <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - Bắt buộc để hỗ trợ `SchemaGenerator` cho Starlette (bạn có thể không cần nó trong FastAPI).

Sử dụng bởi FastAPI / Starlette:

 * in a way that affects its {@link Object#equals} behavior. Undefined behavior and bugs will
 * result.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/NewCollectionTypesExplained#multimap">{@code Multimap}</a>.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible

 * consecutively when iterating. Elements iterate in order by the <i>first</i> appearance of that
 * element when the multiset was created.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/ImmutableCollectionsExplained">immutable collections</a>.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible
@SuppressWarnings("serial") // we're overriding default serialization

</div>

///

この情報は、[Virtual Environments](virtual-environments.md) について学ぶ際にも役立ちます。

## まとめ

これで、**環境変数**とは何か、Pythonでどのように使用するかについて、基本的な理解が得られたはずです。

環境変数についての詳細は、<a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">Wikipedia: Environment Variable</a> を参照してください。

環境変数の用途や適用方法が最初は直感的ではないかもしれませんが、開発中のさまざまなシナリオで繰り返し登場します。そのため、基本を知っておくことが重要です。

 * {@code Multiset}, {@code AtomicLongMap} does not automatically remove zeros.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/NewCollectionTypesExplained#multiset">{@code Multiset}</a>.
 *
 * @author Kevin Bourrillion
 * @since 2.0
 */
@GwtCompatible
public interface Multiset<E extends @Nullable Object> extends Collection<E> {