當學習[虛擬環境](virtual-environments.md)時，這些資訊將會很有用。

## 結論

透過這個教學，你應該對**環境變數**是什麼以及如何在 Python 中使用它們有了基本的了解。

你也可以在<a href="https://zh.wikipedia.org/wiki/%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F" class="external-link" target="_blank">環境變數 - 維基百科</a> (<a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">Wikipedia for Environment Variable</a>) 中了解更多關於它們的資訊。

 *   <li>{@link ImmutableBiMap}
 *   <li>{@link HashBiMap}
 *   <li>{@link EnumBiMap}
 *   <li>{@link EnumHashBiMap}
 * </ul>
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/NewCollectionTypesExplained#bimap">{@code BiMap}</a>.
 *
 * @author Kevin Bourrillion
 * @since 2.0
 */
@GwtCompatible
public interface BiMap<K extends @Nullable Object, V extends @Nullable Object> extends Map<K, V> {

 * java.util.function.Supplier} in a context where a {@code com.google.common.base.Supplier} is
 * needed, use {@code supplier::get}.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/FunctionalExplained">the use of {@code Function}</a>.
 *
 * @author Harry Heymann
 * @since 2.0
 */
@GwtCompatible
@FunctionalInterface

 * Subclasses should override one or more methods to modify the behavior of the backing collection
 * as desired per the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator
 * pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code

Ocultar a documentação apenas torna mais difícil entender como interagir com sua API e pode dificultar sua depuração na produção. Pode ser considerado simplesmente uma forma de <a href="https://en.wikipedia.org/wiki/Security_through_obscurity" class="external-link" target="_blank">Segurança através da obscuridade</a>.

Se você quiser proteger sua API, há várias coisas melhores que você pode fazer, por exemplo:

 * null-hostile method like {@link ImmutableTable#copyOf}. For alternatives, please see <a
 * href="https://github.com/google/guava/wiki/NewCollectionTypesExplained#table">the wiki</a>.
 *
 * <p>The allowed row and column keys must be supplied when the table is created. The table always
 * contains a mapping for every row key / column pair. The value corresponding to a given row and

 * be used, at a small efficiency penalty, to enforce the distinction in the type system.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/PrimitivesExplained#unsigned-support">unsigned
 * primitive utilities</a>.
 *
 * @author Louis Wasserman
 * @author Brian Milch
 * @author Colin Evans
 * @since 10.0
 */
@GwtCompatible

    * There is a **solution** to this, however.
* There's an **extension** to the **TLS** protocol (the one handling the encryption at the TCP level, before HTTP) called **<a href="https://en.wikipedia.org/wiki/Server_Name_Indication" class="external-link" target="_blank"><abbr title="Server Name Indication">SNI</abbr></a>**.

 * or method references instead of classes, leaving your code easier to migrate in the future.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/FunctionalExplained">the use of {@code Function}</a>.
 *
 * @author Kevin Bourrillion
 * @since 2.0
 */
@GwtCompatible
@FunctionalInterface

🖼 🔛 🎦 🌐 🍕 👆 💪, ✋️ ⚫️ 🚫 📶 ⚠, 👆 💪 ✔️ 📨 `item` 🔗, & **FastAPI** 🔜 🚮 ⚫️ `JSONResponse` 👆, 🏭 ⚫️ `dict`, ♒️. 🌐 👈 🔢.

🔜, ➡️ 👀 ❔ 👆 💪 ⚙️ 👈 📨 🛃 📨.

➡️ 💬 👈 👆 💚 📨 <a href="https://en.wikipedia.org/wiki/XML" class="external-link" target="_blank">📂</a> 📨.

👆 💪 🚮 👆 📂 🎚 🎻, 🚮 ⚫️ `Response`, &amp; 📨 ⚫️:

{* ../../docs_src/response_directly/tutorial002.py hl[1,18] *}

## 🗒