user = get_user(fake_db, username)
    if not user:
        return False
    if not verify_password(password, user.hashed_password):
        return False
    return user


def create_access_token(data: dict, expires_delta: Union[timedelta, None] = None):
    to_encode = data.copy()
    if expires_delta:
        expire = datetime.now(timezone.utc) + expires_delta
    else:

   * throws a {@link NullPointerException}.
   *
   * <p>To find the first non-null element in an iterable, use {@code Iterables.find(iterable,
   * Predicates.notNull())}. For varargs, use {@code Iterables.find(Arrays.asList(a, b, c, ...),
   * Predicates.notNull())}, static importing as necessary.
   *
   * <p><b>Note:</b> if {@code first} is represented as an {@link Optional}, this can be

{* ../../docs_src/body/tutorial001_py310.py hl[5:9] *}

쿼리 매개변수를 선언할 때와 같이, 모델 어트리뷰트가 기본 값을 가지고 있어도 이는 필수가 아닙니다. 그외에는 필수입니다. 그저 `None`을 사용하여 선택적으로 만들 수 있습니다.

예를 들면, 위의 이 모델은 JSON "`object`" (혹은 파이썬 `dict`)을 다음과 같이 선언합니다:

```JSON
{
    "name": "Foo",
    "description": "선택적인 설명란",
    "price": 45.2,
    "tax": 3.5
}
```

from typing import Annotated, Any

import pytest
from fastapi import Depends, FastAPI, WebSocket
from fastapi.exceptions import FastAPIError
from fastapi.testclient import TestClient

global_context: ContextVar[dict[str, Any]] = ContextVar("global_context", default={})  # noqa: B039


class Session:
    def __init__(self) -> None:
        self.open = True


async def dep_session() -> Any:
    s = Session()
    yield s

        return asList().iterator();
      }

      @Override
      ImmutableList<Entry<K, V>> createAsList() {
        return new ImmutableList<Entry<K, V>>() {
          @Override
          public Entry<K, V> get(int index) {
            return new AbstractMap.SimpleImmutableEntry<>(
                keySet.asList().get(index), valueList.get(index));
          }

labels.crawling_info_details=Crawling Info 详情
labels.data_config_details=Data Config 详情
labels.dict_kuromoji_details=Dict Kuromoji 详情
labels.dict_mapping_details=Dict Mapping 详情
labels.dict_protwords_details=Dict Protwords 详情
labels.dict_stemmeroverride_details=Dict Stemmeroverride 详情
labels.dict_stopwords_details=Dict Stopwords 详情
labels.dict_synonym_details=Dict Synonym 详情
labels.duplicate_host_details=Duplicate Host 详情

Aber standardmäßig **„funktioniert einfach alles“**.

### Validierung { #validation }

* Validierung für die meisten (oder alle?) Python-**Datentypen**, hierzu gehören:
    * JSON Objekte (`dict`).
    * JSON Listen (`list`), die den Typ ihrer Elemente definieren.
    * Strings (`str`) mit definierter minimaler und maximaler Länge.
    * Zahlen (`int`, `float`) mit Mindest- und Maximalwerten, usw.

* Einen optionalen Query-Parameter `limit`, der ein `int` ist und standardmäßig `100` ist.

Und dann wird einfach ein <abbr title="Dictionary – Zuordnungstabelle: In anderen Sprachen auch Hash, Map, Objekt, Assoziatives Array genannt">`dict`</abbr> zurückgegeben, welches diese Werte enthält.

/// info | Info

FastAPI unterstützt (und empfiehlt die Verwendung von) `Annotated` seit Version 0.95.0.

      client
        .newBuilder()
        .protocols(Arrays.asList(Protocol.HTTP_1_1))
        .build()
    assertContent("A", getResponse(newRequest("/")))
  }

  @Test
  fun setProtocolsWithoutHttp11() {
    assertFailsWith<IllegalArgumentException> {
      OkHttpClient
        .Builder()
        .protocols(Arrays.asList(Protocol.HTTP_2))
    }
  }

  @Test

        return redirect(getClass());
    }

    // ===================================================================================
    //                                                                        Assist Logic
    //                                                                        ============
    /**
     * Creates an ElevateWord entity based on the form and operation mode.
     *