/// tip

如果您已经知道什么是"环境变量"以及如何使用它们，请随意跳到下面的下一节。

///

环境变量（也称为"env var"）是一种存在于 Python 代码之外、存在于操作系统中的变量，可以被您的 Python 代码（或其他程序）读取。

您可以在 shell 中创建和使用环境变量，而无需使用 Python：

//// tab | Linux、macOS、Windows Bash

<div class="termy">

```console
// 您可以创建一个名为 MY_NAME 的环境变量
$ export MY_NAME="Wade Wilson"

// 然后您可以与其他程序一起使用它，例如
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

	_, err = s.adm.AttachPolicy(ctx, madmin.PolicyAssociationReq{
		Policies: []string{policy},
		User:     accessKey,
	})
	if err != nil {
		c.Fatalf("unable to attach policy: %v", err)
	}
	// 2.3 check user has access to bucket
	c.mustListObjects(ctx, uClient, bucket)
	// 2.3 check that user cannot delete the bucket
	err = uClient.RemoveBucket(ctx, bucket)
	if err == nil || err.Error() != "Access Denied." {

///

**FastAPI** được dựa hoàn toàn trên Pydantic.

Bạn sẽ thấy nhiều ví dụ thực tế hơn trong [Hướng dẫn sử dụng](tutorial/index.md){.internal-link target=_blank}.

/// tip

extra configuration may be required for this step to work correctly.

For a simple setup where the user/client app accesses MinIO directly (i.e. with no intervening proxies/load-balancers), and each MinIO server (if there are more than one) has a unique domain name, this redirection should work automatically with no further configuration. For example, if the MinIO service is being accessed by the browser at the URL `https://minio-node-1.example.org`, the redirect URL will be `https://mini...

    // least as long as the pattern because asterisk must match the whole left-most label and
    // hostname starts with a non-empty label. Thus, asterisk has to match one or more characters.
    if (hostname.length < pattern.length) {
      return false // Hostname too short to match the pattern.
    }

    if ("*." == pattern) {

    return insertAt == 0
  }

  /**
   * Schedules immediate execution of [Task.tryCancel] on all currently-enqueued tasks. These calls
   * will not be made until any currently-executing task has completed. Tasks that return true will
   * be removed from the execution schedule.
   */
  fun cancelAll() {
    lock.assertNotHeld()

    taskRunner.lock.withLock {
      if (cancelAllAndDecide()) {

  @Override
  public boolean readBoolean() throws IOException {
    return readUnsignedByte() != 0;
  }

  /**
   * Reads a byte from the input stream checking that the end of file (EOF) has not been
   * encountered.
   *
   * @return byte read from input
   * @throws IOException if an error is encountered while reading
   * @throws EOFException if the end of file (EOF) is encountered.
   */

  /** Creates a new, empty {@link ExecutionList}. */
  public ExecutionList() {}

  /**
   * Adds the {@code Runnable} and accompanying {@code Executor} to the list of listeners to
   * execute. If execution has already begun, the listener is executed immediately.
   *
   * <p>When selecting an executor, note that {@code directExecutor} is dangerous in some cases. See

     * their caseless domain and username fields are equal and either both hashes are external and they are equal or
     * both internally supplied passwords are equal. If one <tt>NtlmPasswordAuthentication</tt> object has external
     * hashes (meaning negotiated via NTLM HTTP Authentication) and the other does not they will not be equal. This is

		w.Header().Set(xhttp.ContentEncoding, objInfo.ContentEncoding)
	}

	if !objInfo.Expires.IsZero() {
		w.Header().Set(xhttp.Expires, objInfo.Expires.UTC().Format(http.TimeFormat))
	}

	// Set tag count if object has tags
	if len(objInfo.UserTags) > 0 {
		tags, _ := tags.ParseObjectTags(objInfo.UserTags)
		if tags != nil && tags.Count() > 0 {
			w.Header()[xhttp.AmzTagCount] = []string{strconv.Itoa(tags.Count())}
			if opts.Tagging {