checkPositionIndexes(fromIndex, toIndex, array.length);
    if (array.length <= 1) {
      return;
    }

    int length = toIndex - fromIndex;
    // Obtain m = (-distance mod length), a non-negative value less than "length". This is how many
    // places left to rotate.
    int m = -distance % length;
    m = (m < 0) ? m + length : m;

 * subtype of {@code Network} that provides methods for adding and removing nodes and edges. If you
 * do not need to mutate a network (e.g. if you write a method than runs a read-only algorithm on
 * the network), you should use the non-mutating {@link Network} interface, or an {@link
 * ImmutableNetwork}.
 *
 * <p>You can create an immutable copy of an existing {@code Network} using {@link
 * ImmutableNetwork#copyOf(Network)}:
 *
 * <pre>{@code

* Filter published OpenAPI schema by making nullable, required fields non-required in order to avoid kubectl to wrongly reject null values. ([#85722](https://github.com/kubernetes/kubernetes/pull/85722), [@sttts](https://github.com/sttts))

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：

<div class="termy">

```console
// 这里我们还没有设置环境变量
$ python main.py

// 因为我们没有设置环境变量，所以我们得到默认值

Hello World from Python

## Changelog since v1.14.8

### Other notable changes

* Fix kubelet metrics gathering on non-English Windows hosts ([#84156](https://github.com/kubernetes/kubernetes/pull/84156), [@wawa0210](https://github.com/wawa0210))

        if ("always".equals(styleColor) || "yes".equals(styleColor) || "force".equals(styleColor)) {
            MessageUtils.setColorEnabled(true);
        } else if ("never".equals(styleColor) || "no".equals(styleColor) || "none".equals(styleColor)) {
            MessageUtils.setColorEnabled(false);
        } else if (!"auto".equals(styleColor) && !"tty".equals(styleColor) && !"if-tty".equals(styleColor)) {
            throw new IllegalArgumentException(

		return b, err
	}
	if err == nil {
		b.defaultTimestamps()
	}

	// If bucket metadata is missing look for legacy files,
	// since we only ever had b.Created as non-zero when
	// migration was complete in 2020-May release. So this
	// a check to avoid migrating for buckets that already
	// have this field set.
	if b.Created.IsZero() {

if [ $expDays -ne 3 ]; then
	echo "BUG: Incorrect expiry days '${expDays}' set for 'siteb'"
	exit 1
fi
if [ $noncurrentDays -ne 2 ]; then
	echo "BUG: Incorrect non current expiry days '${noncurrentDays}' set for siteb"
	exit 1
fi

## Make sure transition rule not replicated to siteb
tranDays=$(./mc ilm rule list siteb/bucket --json | jq '.config.Rules[0].Transition.Days')

 * of {@code Graph} that provides methods for adding and removing nodes and edges. If you do not
 * need to mutate a graph (e.g. if you write a method than runs a read-only algorithm on the graph),
 * you should use the non-mutating {@link Graph} interface, or an {@link ImmutableGraph}.
 *
 * <p>You can create an immutable copy of an existing {@code Graph} using {@link
 * ImmutableGraph#copyOf(Graph)}:
 *
 * <pre>{@code

 * of {@code Graph} that provides methods for adding and removing nodes and edges. If you do not
 * need to mutate a graph (e.g. if you write a method than runs a read-only algorithm on the graph),
 * you should use the non-mutating {@link Graph} interface, or an {@link ImmutableGraph}.
 *
 * <p>You can create an immutable copy of an existing {@code Graph} using {@link
 * ImmutableGraph#copyOf(Graph)}:
 *
 * <pre>{@code