// TODO(user): verify future behavior - unify logic with getFutureValue in AbstractFuture. This
      // code should be unreachable with correctly implemented Futures.
      // Cancel this future and return.
      // At this point, inputFuture is cancelled and outputFuture doesn't exist, so the value of
      // mayInterruptIfRunning is irrelevant.
      cancel(false);
      return;
    } catch (ExecutionException e) {

    }


    public static int enc_floatbe ( float f, byte[] dst, int di ) {
        return enc_uint32be(Float.floatToIntBits(f), dst, di);
    }


    /*
     * Decode floating point numbers
     */

    public static float dec_floatle ( byte[] src, int si ) {
        return Float.intBitsToFloat(dec_uint32le(src, si));
    }


    public static float dec_floatbe ( byte[] src, int si ) {

デフォルトの例外ハンドラを`fastapi.exception_handlers`からインポートして再利用することができます:

```Python hl_lines="2 3 4 5 15 21"
{!../../docs_src/handling_errors/tutorial006.py!}
```

この例では、非常に表現力のあるメッセージでエラーを`print`しています。

////

### 在 Python 中读取环境变量

您还可以在 Python 之外的地方（例如终端中或使用任何其他方法）创建环境变量，然后在 Python 中读取它们。

例如，您可以有一个名为 `main.py` 的文件，其中包含以下内容：

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

<a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> 的第二个参数是要返回的默认值。

	json := jsoniter.ConfigCompatibleWithStandardLibrary
	v, err := json.Marshal(b)
	if err != nil {
		bugLogIf(context.Background(), err) // Unlikely
		return nil
	}
	return map[string]string{fmt.Sprintf("%s-metacache-part-%d", ReservedMetadataPrefixLower, b.n): string(v)}
}

// pastPrefix returns true if the given prefix is before start of the block.
func (b metacacheBlock) pastPrefix(prefix string) bool {

   Route to host "productpage2" with weight 20%
   Route to host "productpage3" with weight 50%
   Match: /prefix*
`,
		},
	}

	for i, c := range cases {
		t.Run(fmt.Sprintf("case %d %s", i, strings.Join(c.args, " ")), func(t *testing.T) {
			verifyExecAndK8sConfigTestCaseTestOutput(t, c)
		})
	}
}

func TestGetRevisionFromPodAnnotation(t *testing.T) {
	cases := []struct {

		}

		vwhYAML, err := generateValidatingWebhook(validationWhConfig, opts)
		if err != nil {
			return "", fmt.Errorf("failed to create validating webhook: %w", err)
		}
		tagWhYAML = fmt.Sprintf(`%s
---
%s`, tagWhYAML, vwhYAML)
	}

	return tagWhYAML, nil
}

func fixWhConfig(client kube.Client, whConfig *tagWebhookConfig) (*tagWebhookConfig, error) {
	if whConfig.URL != "" {

   *         return Math.sqrt((int) in);
   *       }
   *     };
   * Map<String, Double> transformed = Maps.transformValues(map, sqrt);
   * System.out.println(transformed);
   * }</pre>
   *
   * ... prints {@code {a=2.0, b=3.0}}.
   *
   * <p>Changes in the underlying map are reflected in this view. Conversely, this view supports
   * removal operations, and these are reflected in the underlying map.
   *

   *         return Math.sqrt((int) in);
   *       }
   *     };
   * Map<String, Double> transformed = Maps.transformValues(map, sqrt);
   * System.out.println(transformed);
   * }</pre>
   *
   * ... prints {@code {a=2.0, b=3.0}}.
   *
   * <p>Changes in the underlying map are reflected in this view. Conversely, this view supports
   * removal operations, and these are reflected in the underlying map.
   *

				return nil
			}

			for typ, data := range data {
				// zip writer only handles one concurrent write
				writeMu.Lock()
				profilingDataFound = true
				err := embedFileInZip(zipWriter, fmt.Sprintf("profile-%s-%s", client.host.String(), typ), data, 0o600)
				writeMu.Unlock()
				if err != nil {
					reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())