使用以下代码创建类实例：

{* ../../docs_src/dependencies/tutorial011.py hl[16] *}

这样就可以**参数化**依赖项，它包含 `checker.fixed_content` 的属性 - `"bar"`。

## 把实例作为依赖项

然后，不要再在 `Depends(checker)` 中使用 `Depends(FixedContentQueryChecker)`， 而是要使用 `checker`，因为依赖项是类实例 - `checker`，不是类。

处理依赖项时，**FastAPI** 以如下方式调用 `checker`：

```Python
checker(q="somequery")
```

……并用*路径操作函数*的参数 `fixed_content_included` 返回依赖项的值：

## Die Instanz als Abhängigkeit verwenden { #use-the-instance-as-a-dependency }

Dann könnten wir diesen `checker` in einem `Depends(checker)` anstelle von `Depends(FixedContentQueryChecker)` verwenden, da die Abhängigkeit die Instanz `checker` und nicht die Klasse selbst ist.

Und beim Auflösen der Abhängigkeit ruft **FastAPI** diesen `checker` wie folgt auf:

```Python

    def __call__(self, q: str = ""):
        if q:
            return self.fixed_content in q
        return False


checker = FixedContentQueryChecker("bar")


@app.get("/query-checker/")
async def read_query_check(fixed_content_included: Annotated[bool, Depends(checker)]):

    "path,expected_status,expected_response",
    [
        (
            "/query-checker/",
            200,
            {"fixed_content_in_query": False},
        ),
        (
            "/query-checker/?q=qwerty",
            200,
            {"fixed_content_in_query": False},
        ),
        (
            "/query-checker/?q=foobar",
            200,
            {"fixed_content_in_query": True},
        ),

          <item index="10" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
          <item index="11" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
          <item index="12" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />

import (
	"context"
	"encoding/base64"
	"runtime"
	"strings"

	"github.com/minio/minio-go/v7/pkg/s3utils"
)

// Checks on CopyObject arguments, bucket and object.
func checkCopyObjArgs(ctx context.Context, bucket, object string) error {
	return checkBucketAndObjectNames(ctx, bucket, object)
}

// Checks on GetObject arguments, bucket and object.
func checkGetObjArgs(ctx context.Context, bucket, object string) error {

              public void close() throws IOException {
                super.close();
                counter[0]--;
              }
            };
          }
        };
    byte[] result = ByteSource.concat(checker, checker, checker).read();
    assertThat(result).hasLength(150);
  }

  private void joinHelper(Integer... spans) throws Exception {
    List<ByteSource> sources = new ArrayList<>();
    int start = 0;

  }

  private static void checkMd5(String expected, byte[] key, String data) {
    checkMd5(expected, key, data.getBytes(UTF_8));
  }

  private static void checkMd5(String expected, byte[] key, byte[] data) {
    checkHmac(expected, Hashing.hmacMd5(key), data);
  }

  private static void checkHmac(String expected, HashFunction hashFunc, byte[] data) {

- Kubeadm: during kubelet health checks, respect the healthz address:port configured in the KubeletConfiguration instead of hardcoding localhost:10248. ([#125265](https://github.com/kubernetes/kubernetes/pull/125265), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

		return false
	}

	// If format.json is available and request sent the right disk-id, we allow the request
	return true
}

// checkID - check if the disk-id in the request corresponds to the underlying disk.
func (s *storageRESTServer) checkID(wantID string) bool {
	if s.getStorage() == nil {
		return false
	}
	if wantID == "" {
		// Request sent empty disk-id, we allow the request