final String s = url.toExternalForm();
        return URLUtil.decode(s, "UTF8");
    }

    /**
     * Returns the file name of the resource.
     *
     * @param url
     *            The resource URL. Must not be {@literal null}.
     * @return The file name.
     */
    public static String getFileName(final URL url) {
        assertArgumentNotNull("url", url);

        void testToString() {
            String result = fileFsSizeInfo.toString();

            assertNotNull(result);
            assertTrue(result.contains("SmbInfoAllocation")); // Note: toString() uses this name
            assertTrue(result.contains("alloc="));
            assertTrue(result.contains("free="));
        }
    }

    @Nested
    @DisplayName("FileFsFullSizeInformation Implementation Tests")

  }

  /**
   * Returns an immutable sorted multiset containing the elements of a sorted multiset, sorted by
   * the same {@code Comparator}. That behavior differs from {@link #copyOf(Iterable)}, which always
   * uses the natural ordering of the elements.
   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is

 */
public class AdminDuplicatehostAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminDuplicatehostAction() {
        super();
    }

    /**
     * Role name for duplicate host administration.
     */
    public static final String ROLE = "admin-duplicatehost";

    private static final Logger logger = LogManager.getLogger(AdminDuplicatehostAction.class);

* `Optional`
* ...и др.

называются **Generic-типами** или **Generics**.

### Классы как типы

Вы также можете объявить класс как тип переменной.

Допустим, у вас есть класс `Person` с полем `name`:

{* ../../docs_src/python_types/tutorial010.py hl[1:3] *}


Тогда вы можете объявить переменную типа `Person`:

{* ../../docs_src/python_types/tutorial010.py hl[6] *}

Output decrypted to inspect.ad2b43d8.zip
```

            putValue(data, "Disposition", message.getDisposition());
            putValue(data, "Encoding", message.getEncoding());
            putValue(data, "File-Name", message.getFileName());
            putValue(data, "From", message.getFrom());
            putValue(data, "Line-Count", message.getLineCount());
            putValue(data, "Message-ID", message.getMessageID());

                    uq.setCreateTime(SystemUtil.currentTimeMillis());
                    uq.setDepth(depth);
                    uq.setMethod(d.getMethod().name());
                    uq.setEncoding(encoding);
                    uq.setParentUrl(url);
                    uq.setSessionId(crawlerContext.getSessionId());
                    uq.setUrl(d.getUrl());

		zb0001--
		field, err = dc.ReadMapKeyPtr()
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		switch msgp.UnsafeString(field) {
		case "Name":
			z.Name, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Name")
				return
			}
		case "NextCycle":
			z.NextCycle, err = dc.ReadUint32()
			if err != nil {
				err = msgp.WrapError(err, "NextCycle")
				return
			}

</div>

////

## 在 Python 中讀取環境變數

你也可以在 Python **之外**的終端機中建立環境變數（或使用其他方法），然後在 Python 中**讀取**它們。

例如，你可以建立一個名為 `main.py` 的檔案，其中包含以下內容：

```Python hl_lines="3"
import os

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

/// tip

第二個參數是 <a href="https://docs.python.org/zh-tw/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> 的預設回傳值。