private const val UNICODE_3 = 0x2202

    /** Arbitrary code point that's 4 bytes in UTF-8 and valid in IdnaMappingTable.txt. */
    private const val UNICODE_4 = 0x1d11e

    /**
     * Returns a new instance configured with a default encode set for the ASCII range. The specific
     * rules vary per-component: for example, '?' may be identity-encoded in a fragment, but must be
     * percent-encoded in a path.
     *

   * created using {@link CacheBuilder} only does so if the {@link CacheBuilder#recordStats} method
   * was called. If statistics are not being recorded, a {@code CacheStats} instance with zero for
   * all values is returned.
   *
   */
  CacheStats stats();

  /**
   * Returns a view of the entries stored in this cache as a thread-safe map. Modifications made to

```Python hl_lines="7  21  23"
{!../../docs_src/custom_response/tutorial004.py!}
```

In diesem Beispiel generiert die Funktion `generate_html_response()` bereits eine `Response` und gibt sie zurück, anstatt das HTML in einem `str` zurückzugeben.

Indem Sie das Ergebnis des Aufrufs von `generate_html_response()` zurückgeben, geben Sie bereits eine `Response` zurück, die das Standardverhalten von **FastAPI** überschreibt.

    assertEquals(
        com.google.common.base.Optional.of("2"),
        generator.generateFresh(new TypeToken<com.google.common.base.Optional<String>>() {}));
    // Test that the first generated instance for different cgcb.Optional<T> is always absent().
    // Having generated cgcb.Optional<String> instances doesn't prevent absent() from being
    // generated for other cgcb.Optional types.
    assertEquals(

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package install

import (
	"context"
	"os"
	"path/filepath"
	"testing"
	"time"

	"istio.io/istio/cni/pkg/config"
	testutils "istio.io/istio/pilot/test/util"
	"istio.io/istio/pkg/file"

* Only use the first IP address got from instance metadata. This is because Azure CNI would set up a list of IP addresses in instance metadata, while only the first one is the Node's IP. ([#71736](https://github.com/kubernetes/kubernetes/pull/71736), [@feiskyer](https://github.com/feiskyer))

Pydantic 支持使用外部库从这些类型的文件中读取。您可以在<a href="https://docs.pydantic.dev/latest/concepts/pydantic_settings/#dotenv-env-support" class="external-link" target="_blank">Pydantic 设置: Dotenv (.env) 支持</a>中阅读更多相关信息。

/// tip

要使其工作，您需要执行 `pip install python-dotenv`。

///

### `.env` 文件

您可以使用以下内容创建一个名为 `.env` 的文件：

```bash
ADMIN_EMAIL="******@****.***"
APP_NAME="ChimichangApp"
```

### 从 `.env` 文件中读取设置

					db.assignInterfacesToValue(exprs)
				}
				return
			}
		}
	}
}

// FirstOrInit finds the first matching record, otherwise if not found initializes a new instance with given conds.
// Each conds must be a struct or map.
//
// FirstOrInit never modifies the database. It is often used with Assign and Attrs.
//
//	// assign an email if the record is not found

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install Old JDK 8
        uses: actions/setup-java@v4
        with:
          distribution: 'zulu'
          java-version: 8.0.242

      - name: Configure JDK
        uses: actions/setup-java@v4
        with:

But in case you needed it for an advanced scenario, you can add custom headers:

```Python hl_lines="14"
{!../../docs_src/handling_errors/tutorial002.py!}
```

## Install custom exception handlers

You can add custom exception handlers with <a href="https://www.starlette.io/exceptions/" class="external-link" target="_blank">the same exception utilities from Starlette</a>.