如果你想了解在不同 FastAPI 版本中改了哪些內容，可以在進階指南中閱讀：[進階相依 — 含 `yield`、`HTTPException`、`except` 與背景任務的相依](../../advanced/advanced-dependencies.md#dependencies-with-yield-httpexception-except-and-background-tasks)。
## 情境管理器 { #context-managers }

### 什麼是「情境管理器」 { #what-are-context-managers }

「情境管理器」是那些你可以在 `with` 陳述式中使用的 Python 物件。

例如，[你可以用 `with` 來讀取檔案](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files)：

```Python

## Gerenciadores de contexto { #context-managers }

### O que são "Gerenciadores de Contexto" { #what-are-context-managers }

"Gerenciadores de Contexto" são qualquer um dos objetos Python que podem ser utilizados com a declaração `with`.

FIELD com.google.common.collect.ConcurrentHashMultiset.countMap
FIELD com.google.common.collect.ImmutableMultiset.asList
FIELD com.google.common.collect.ImmutableRangeMap.ranges
FIELD com.google.common.collect.ImmutableRangeSet.ranges
FIELD com.google.common.collect.ImmutableSet.asList
FIELD com.google.common.collect.JdkBackedImmutableBiMap.inverse
FIELD com.google.common.collect.Maps.FilteredMapValues.unfiltered

v1.21.14](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager) | [amd64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-amd64), [arm](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-arm), [arm64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-arm64), [ppc64le](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-co...

```
api                   manage global HTTP API call specific features, such as throttling, authentication types, etc.
heal                  manage object healing frequency and bitrot verification checks
scanner               manage namespace scanning for usage calculation, lifecycle, healing and more
```

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 */

package jcifs.dcerpc.msrpc;

/**
 * MSRPC implementation for connecting to the SAM service.
 * This class provides functionality to establish a connection to the
 * Security Account Manager (SAM) database using the SAMR RPC interface.
 */
public class MsrpcSamrConnect2 extends samr.SamrConnect2 {

    /**
     * Creates a new request to connect to the SAM service.
     *

 */

package jcifs.smb1.dcerpc.msrpc;

/**
 * MSRPC implementation for connecting to the SAM service (version 4).
 * This class provides functionality to establish a connection to the
 * Security Account Manager (SAM) database using the SAMR RPC interface version 4.
 */
public class MsrpcSamrConnect4 extends samr.SamrConnect4 {

    /**
     * Creates a new request to connect to the SAM service.
     *

FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT