例如，要安装 Uvicorn，可以运行以下命令：

<div class="termy">

```console
$ pip install "uvicorn[standard]"

---> 100%
```

</div>

类似的流程也适用于任何其他 ASGI 服务器程序。

/// tip | 提示

通过添加 `standard` 选项，Uvicorn 将安装并使用一些推荐的额外依赖项。

其中包括 `uvloop`，这是 `asyncio` 的高性能替代方案，能够显著提升并发性能。

当您使用 `pip install "fastapi[standard]"` 安装 FastAPI 时，实际上也会安装 `uvicorn[standard]`。

///

## 运行服务器程序 { #run-the-server-program }

The result of calling it is something that can be encoded with the Python standard [`json.dumps()`](https://docs.python.org/3/library/json.html#json.dumps).

It doesn't return a large `str` containing the data in JSON format (as a string). It returns a Python standard data structure (e.g. a `dict`) with values and sub-values that are all compatible with JSON.

/// note

                    return new StandardImplForwardingCollection<>(
                        new LinkedList<>(asList(elements)));
                  }
                })
            .named("ForwardingCollection[LinkedList] with standard implementations")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.ALLOWS_NULL_VALUES,
                CollectionFeature.GENERAL_PURPOSE)
            .createTestSuite());

 *
 * <p>Each of the {@code standard} methods, where appropriate, uses the set's comparator (or the
 * natural ordering of the elements, if there is no comparator) to test element equality. As a
 * result, if the comparator is not consistent with equals, some of the standard implementations may
 * violate the {@code Set} contract.
 *
 * <p>The {@code standard} methods and the collection views they return are not guaranteed to be

                    return new StandardImplForwardingSortedMap<>(map);
                  }
                })
            .named(
                "ForwardingSortedMap[SafeTreeMap] with no comparator and standard "
                    + "implementations")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                MapFeature.ALLOWS_NULL_VALUES,

Certifique-se de criar um [ambiente virtual](../virtual-environments.md), ativá-lo e então **instalar o FastAPI**:

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

/// note | Nota

Quando você instala com `pip install "fastapi[standard]"`, ele vem com algumas dependências opcionais padrão, incluindo `fastapi-cloud-cli`, que permite fazer deploy na [FastAPI Cloud](https://fastapicloud.com).

Le résultat de son appel est quelque chose qui peut être encodé avec la fonction standard de Python [`json.dumps()`](https://docs.python.org/3/library/json.html#json.dumps).

Elle ne renvoie pas une grande `str` contenant les données au format JSON (sous forme de chaîne). Elle renvoie une structure de données standard de Python (par ex. un `dict`) avec des valeurs et sous-valeurs toutes compatibles avec JSON.

/// note | Remarque

            // Standard rights should be in bits 16-23 (0x00FF0000)
            assertTrue(ACE.DELETE >= 0x00010000 && ACE.DELETE <= 0x00FF0000, "DELETE should be in standard rights range");
            assertTrue(ACE.READ_CONTROL >= 0x00010000 && ACE.READ_CONTROL <= 0x00FF0000, "READ_CONTROL should be in standard rights range");

	parts3SC := globalStorageClass

	// Object for test case 4 - Standard StorageClass defined as Parity 6, MetaData in PutObject requesting Standard Storage Class
	object4 := "object4"
	metadata4 := make(map[string]string)
	metadata4["x-amz-storage-class"] = storageclass.STANDARD
	globalStorageClass.Update(storageclass.Config{
		Standard: storageclass.StorageClass{
			Parity: 6,
		},
	})

///

## Automatische Konvertierung { #automatic-conversion }

`Header` bietet etwas zusätzliche Funktionalität im Vergleich zu `Path`, `Query` und `Cookie`.

Die meisten Standard-Header sind durch ein „Bindestrich“-Zeichen getrennt, auch bekannt als „Minus-Symbol“ (`-`).

Aber eine Variable wie `user-agent` ist in Python ungültig.