// Following is ported from C to Go in 2016 by Justin Ruggles, with minimal alteration.
// Used uint for unsigned long. Used uint32 for input arguments in order to match
// the Go hash/crc32 package. zlib CRC32 combine (https://github.com/madler/zlib)
// Modified for hash/crc64 by Klaus Post, 2024.
func gf2MatrixTimes(mat []uint64, vec uint64) uint64 {
	var sum uint64

	for vec != 0 {
		if vec&1 != 0 {
			sum ^= mat[0]
		}

- Kubeadm: fixes a preflight check that can fail hostname construction in IPV6 setups ([#134591](https://github.com/kubernetes/kubernetes/pull/134591), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Auth, Cloud Provider, Cluster Lifecycle and Testing]

/**
 * Static utility methods pertaining to {@code boolean} primitives, that are not already found in
 * either {@link Boolean} or {@link Arrays}.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/PrimitivesExplained">primitive utilities</a>.
 *
 * @author Kevin Bourrillion
 * @since 1.0
 */
@GwtCompatible
public final class Booleans {
  private Booleans() {}

/**
 * Static utility methods pertaining to {@code boolean} primitives, that are not already found in
 * either {@link Boolean} or {@link Arrays}.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/PrimitivesExplained">primitive utilities</a>.
 *
 * @author Kevin Bourrillion
 * @since 1.0
 */
@GwtCompatible
public final class Booleans {
  private Booleans() {}

 *
 * <p>See the Guava User Guide section on <a href=
 * "https://github.com/google/guava/wiki/RangesExplained#discrete-domains">{@code
 * DiscreteDomain}</a>.
 *
 * @author Kevin Bourrillion
 * @since 10.0
 */
@SuppressWarnings("rawtypes") // https://github.com/google/guava/issues/989
@GwtCompatible
public abstract class DiscreteDomain<C extends Comparable> {

  /**

For urgent issues (e.g. production down, etc.), subscribe to [SUBNET](https://min.io/pricing?jmp=github) for direct to engineering support.
 
<!--- Provide a general summary of the issue in the Title above -->

      /*
       * The subList() docs claim that this should be an
       * IndexOutOfBoundsException, but many JDK implementations throw
       * IllegalArgumentException:
       * https://bugs.openjdk.org/browse/JDK-4506427
       */
    }
  }

  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  public void testSubList_empty() {

      /*
       * The subList() docs claim that this should be an
       * IndexOutOfBoundsException, but many JDK implementations throw
       * IllegalArgumentException:
       * https://bugs.openjdk.org/browse/JDK-4506427
       */
    }
  }

  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  public void testSubList_empty() {

	errRoleArnPresentForMultipleTargets = Errorf("`Role` should be empty in ReplicationConfiguration for multiple targets")
)

// Config - replication configuration specified in
// https://docs.aws.amazon.com/AmazonS3/latest/dev/replication-add-config.html
type Config struct {
	XMLName xml.Name `xml:"ReplicationConfiguration" json:"-"`
	Rules   []Rule   `xml:"Rule" json:"Rules"`

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。

如果没有提供默认值，默认为 `None`，此处我们提供了 `"World"` 作为要使用的默认值。

///

然后，您可以调用该 Python 程序：