///

这里我们在你的 Pydantic `Settings` 类中定义配置项 `env_file`，并将其设置为我们想要使用的 dotenv 文件名。

### 使用 `lru_cache` 仅创建一次 `Settings` { #creating-the-settings-only-once-with-lru-cache }

从磁盘读取文件通常是一个代价较高（缓慢）的操作，所以你可能希望只在第一次读取，然后复用同一个设置对象，而不是为每个请求都重新读取。

但是，每次我们执行：

```Python
Settings()
```

都会创建一个新的 `Settings` 对象，并且在创建时会再次读取 `.env` 文件。

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.dict.protwords;

import org.codelibs.fess.app.web.admin.dict.protwords.CreateForm;

/**
 * Request body for creating protected words dictionary via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.reqheader;

import org.codelibs.fess.app.web.admin.reqheader.CreateForm;

/**
 * Request body for creating request header via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */

   * MoreExecutors#listeningDecorator( java.util.concurrent.ExecutorService)}, {@link
   * ListenableFutureTask}, {@link AbstractFuture}, and other utilities over creating plain {@code
   * Future} instances to be upgraded to {@code ListenableFuture} after the fact.
   */
  public static <V extends @Nullable Object> ListenableFuture<V> listenInPoolThread(
      Future<V> future) {

# Reference

Here's the reference or code API, the classes, functions, parameters, attributes, and
all the FastAPI parts you can use in your applications.

If you want to **learn FastAPI** you are much better off reading the

 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * Provides an immutable XML processing API for Maven, offering classes and interfaces
 * for reading, manipulating, and writing XML documents in a thread-safe manner.
 * This package is used extensively for POM, settings, and other Maven configuration files.
 *
 * @since 4.0.0
 */

import com.google.common.annotations.GwtCompatible;

/**
 * A generator that relies on a preexisting generator for most of its work. For example, a derived
 * iterator generator may delegate the work of creating the underlying collection to an inner
 * collection generator.
 *
 * <p>{@code GwtTestSuiteGenerator} expects every {@code DerivedIterator} implementation to provide

import com.google.common.annotations.GwtCompatible;

/**
 * A generator that relies on a preexisting generator for most of its work. For example, a derived
 * iterator generator may delegate the work of creating the underlying collection to an inner
 * collection generator.
 *
 * <p>{@code GwtTestSuiteGenerator} expects every {@code DerivedIterator} implementation to provide

   * the event source has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be
     * notified. The caller must cancel the returned event source when it is no longer in use.
     */

If you want to ask how to do something, or to understand why something isn't working the way you expect it to, use Stack Overflow. https://stackoverflow.com/questions/tagged/okhttp