from fastapi import Cookie, FastAPI

app = FastAPI()


@app.get("/items/")
async def read_items(ads_id: str | None = Cookie(default=None)):

from fastapi import FastAPI

app = FastAPI(swagger_ui_parameters={"deepLinking": False})


@app.get("/users/{username}")
async def read_user(username: str):

 *     .transform((closer, result) -> result.get("userName"), directExecutor())
 *     .catching(DBException.class, e -> "no user", directExecutor())
 *     .finishToValueAndCloser(
 *         valueAndCloser -> this.userNameValueAndCloser = valueAndCloser, executor);
 *
 * // later
 * try { // get() will throw if the operation failed or was cancelled.
 *   UserName userName = userNameValueAndCloser.get();
 *   // do something with userName

      Object newArg = argGenerators.get(i).generateFresh(params.get(i).getType());

      if (newArg == null || Objects.equals(args.get(i), newArg)) {
        if (params.get(i).getType().getRawType().isEnum()) {
          continue; // Nothing better we can do if it's single-value enum
        }
        throw new ParameterHasNoDistinctValueException(params.get(i));
      }
      newArgs.set(i, newArg);

     */
    public LifecycleNotFoundException(String lifecycleId) {
        super("Unknown lifecycle " + lifecycleId);
        this.lifecycleId = (lifecycleId != null) ? lifecycleId : "";
    }

    /**
     * Gets the identifier of the lifecycle that was not found.
     *
     * @return The identifier of the lifecycle that was not found, never {@code null}.
     */
    public String getLifecycleId() {
        return lifecycleId;

from fastapi import FastAPI
from fastapi.responses import FileResponse

some_file_path = "large-video-file.mp4"
app = FastAPI()


@app.get("/")
async def main():

    private final ImmutableList<E> list;

    Itr(ImmutableList<E> list, int index) {
      super(list.size(), index);
      this.list = list;
    }

    @Override
    protected E get(int index) {
      return list.get(index);
    }
  }

  @Override
  public int indexOf(@Nullable Object object) {
    return (object == null) ? -1 : Lists.indexOfImpl(this, object);
  }

  @Override

    * 数据库模型
    * ......以及更多其他类型
* 自动生成的交互式 API 文档，包括两种可选的用户界面：
    * Swagger UI
    * ReDoc

---

回到前面的代码示例，**FastAPI** 将会：

* 校验 `GET` 和 `PUT` 请求的路径中是否含有 `item_id`。
* 校验 `GET` 和 `PUT` 请求中的 `item_id` 是否为 `int` 类型。
    * 如果不是，客户端将会收到清晰有用的错误信息。
* 检查 `GET` 请求中是否有命名为 `q` 的可选查询参数（比如 `http://127.0.0.1:8000/items/foo?q=somequery`）。
    * 因为 `q` 被声明为 `= None`，所以它是可选的。
    * 如果没有 `None` 它将会是必需的 (如 `PUT` 例子中的请求体)。

    Predicate<Throwable> predicate = INSTANCE_OF.get(expectedThrowable);
    if (predicate == null) {
      throw new IllegalArgumentException(
          expectedThrowable
              + " is not yet supported by ReflectionFreeAssertThrows. Add an entry for it in the"
              + " map in that class.");
    }
    Object result;
    try {
      result = supplier.get();
    } catch (Throwable t) {

    public void warnAboutDeprecatedOptions(ParserRequest request, Consumer<String> printWriter) {}

    @Override
    public void displayHelp(ParserRequest request, Consumer<String> printWriter) {
        options.get(0).displayHelp(request, printWriter);
    }

    protected <T> Optional<T> returnFirstPresentOrEmpty(Function<O, Optional<T>> getter) {
        for (O option : options) {
            Optional<T> o = getter.apply(option);