/// tip | 提示

如果你已经知道什么是“环境变量”并且知道如何使用它们，你可以放心跳过这一部分。

///

环境变量（也称为“**env var**”）是一个独立于 Python 代码**之外**的变量，它存在于**操作系统**中，可以被你的 Python 代码（或其他程序）读取。

环境变量对于处理应用程序**设置**、作为 Python **安装**的一部分等方面非常有用。

## 创建和使用环境变量 { #create-and-use-env-vars }

你在 **shell（终端）**中就可以**创建**和使用环境变量，并不需要用到 Python：

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console
// 你可以使用以下命令创建一个名为 MY_NAME 的环境变量
$ export MY_NAME="Wade Wilson"

		if err != nil {
			return err
		}

		if p.Version == 0 {
			// This means that policy was in the old version (without any
			// timestamp info). We fetch the mod time of the file and save
			// that as create and update date.
			p.CreateDate = objInfo.ModTime
			p.UpdateDate = objInfo.ModTime
		}

		m[policy] = p
		return nil
	}
}

   *
   * <p><b>Note:</b> if mutability is not required and the elements are non-null, use {@link
   * ImmutableSet#copyOf(Iterator)} instead.
   *
   * <p><b>Note:</b> if {@code E} is an {@link Enum} type, you should create an {@link EnumSet}
   * instead.
   *
   * <p>Overall, this method is not very useful and will likely be deprecated in the future.
   */

  private static <K, V>
      MapMakerInternalMap<K, V, ? extends InternalEntry<K, V, ?>, ? extends Segment<K, V, ?, ?>>
          makeMap(MapMaker maker) {
    return MapMakerInternalMap.create(maker);
  }

  private static MapMaker createMapMaker() {
    MapMaker maker = new MapMaker();
    maker.useCustomMap = true;
    return maker;
  }

  // constructor tests

  private static <K, V>
      MapMakerInternalMap<K, V, ? extends InternalEntry<K, V, ?>, ? extends Segment<K, V, ?, ?>>
          makeMap(MapMaker maker) {
    return MapMakerInternalMap.create(maker);
  }

  private static MapMaker createMapMaker() {
    MapMaker maker = new MapMaker();
    maker.useCustomMap = true;
    return maker;
  }

  // constructor tests

Se você estiver pronto para adotar uma **ferramenta que gerencia tudo** para você (incluindo a instalação do Python), experimente [uv](https://github.com/astral-sh/uv).

///

## Criar um Projeto { #create-a-project }

Primeiro, crie um diretório para seu projeto.

O que normalmente faço é criar um diretório chamado `code` dentro do meu diretório home/user.

E dentro disso eu crio um diretório por projeto.

    - `kubectl create clusterrolebinding anonymous-discovery --clusterrole=system:discovery --group=system:unauthenticated`
    - `kubectl create clusterrolebinding anonymous-access-review --clusterrole=system:basic-user --group=system:unauthenticated`

- Route controller now respects rate limiting to the cloud provider on deletion; previously it was only for create. ([#78581](https://github.com/kubernetes/kubernetes/pull/78581), [@andrewsykim](https://github.com/andrewsykim))
- Removed extra pod creation expectations when daemonset fails to create pods in batches. ([#74856](https://github.com/kubernetes/kubernetes/pull/74856), [@draveness](https://github.com/draveness))

    service.runSecondBarrier.await();
    service.awaitTerminated();
    // Only called once overall.
    assertEquals(1, service.numberOfTimesSchedulerCalled.get());
  }

  public void testTimeout() {
    // Create a service whose executor will never run its commands
    Service service =
        new AbstractScheduledService() {
          @Override
          protected Scheduler scheduler() {

    service.runSecondBarrier.await();
    service.awaitTerminated();
    // Only called once overall.
    assertEquals(1, service.numberOfTimesSchedulerCalled.get());
  }

  public void testTimeout() {
    // Create a service whose executor will never run its commands
    Service service =
        new AbstractScheduledService() {
          @Override
          protected Scheduler scheduler() {