security_scopes: SecurityScopes,
        db_session: Annotated[str, Depends(get_db_session)],
    ):
        call_counts["get_current_user"] += 1
        return {
            "user": f"user_{call_counts['get_current_user']}",
            "scopes": security_scopes.scopes,
            "db_session": db_session,
        }

    def get_user_me(
        current_user: Annotated[dict, Security(get_current_user, scopes=["me"])],
    ):

## `Path` 임포트 { #import-path }

먼저 `fastapi`에서 `Path`를 임포트하고, `Annotated`도 임포트합니다:

{* ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py hl[1,3] *}

/// info | 정보

FastAPI는 0.95.0 버전에서 `Annotated` 지원을 추가했고(그리고 이를 권장하기 시작했습니다).

더 오래된 버전이 있다면 `Annotated`를 사용하려고 할 때 오류가 발생합니다.

`Annotated`를 사용하기 전에 최소 0.95.1까지 [FastAPI 버전 업그레이드](../deployment/versions.md#upgrading-the-fastapi-versions)를 꼭 하세요.

async def read_optional_list_alias(
    p: Annotated[list[str] | None, Form(alias="p_alias")] = None,
):
    return {"p": p}


class FormModelOptionalListAlias(BaseModel):
    p: list[str] | None = Field(None, alias="p_alias")


@app.post("/model-optional-list-alias", operation_id="model_optional_list_alias")
async def read_model_optional_list_alias(
    p: Annotated[FormModelOptionalListAlias, Form()],
):

    yield s
    s.open = False
    global_state = global_context.get()
    global_state["session_closed"] = True


SessionFuncDep = Annotated[Session, Depends(dep_session, scope="function")]
SessionRequestDep = Annotated[Session, Depends(dep_session, scope="request")]
SessionDefaultDep = Annotated[Session, Depends(dep_session)]


class NamedSession:
    def __init__(self, name: str = "default") -> None:
        self.name = name

        where:
        ruleElem << [new BinaryBreakingChangesRule([:]), new SinceAnnotationRule([:]), new IncubatingMissingRule([:])]
        error << ['Is not binary compatible.', 'Is not annotated with @since', 'Is not annotated with @Incubating']
    }

    def "the @since annotation on inner classes is recognised"() {
        given:
        def rule = withContext(new SinceAnnotationRule([:]))

def sync_validated(item: ItemIn, dep: Annotated[int, Depends(dep_b)]):
    return ItemOut(name=item.name, value=item.value, dep=dep)


@app.get("/sync/dict-no-response-model")
def sync_dict_no_response_model():
    return {"name": "foo", "value": 123}


@app.get("/sync/dict-with-response-model", response_model=ItemOut)
def sync_dict_with_response_model(
    dep: Annotated[int, Depends(dep_b)],
):

### `Query` と `Annotated` のインポート { #import-query-and-annotated }

そのために、まずは以下をインポートします:

* `fastapi` から `Query`
* `typing` から `Annotated`

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[1,3] *}

/// info | 情報

FastAPI はバージョン 0.95.0 で `Annotated` のサポートを追加し（推奨し始め）ました。

古いバージョンの場合、`Annotated` を使おうとするとエラーになります。

    yield
    raise HTTPException(status_code=503, detail="Exception after yield")


SessionFuncDep = Annotated[Session, Depends(dep_session, scope="function")]
SessionRequestDep = Annotated[Session, Depends(dep_session, scope="request")]
SessionDefaultDep = Annotated[Session, Depends(dep_session)]


class NamedSession:
    def __init__(self, name: str = "default") -> None:
        self.name = name

from typing import Annotated

import pytest
from fastapi import FastAPI, Header
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel, Field

app = FastAPI()

# =====================================================================================
# Without aliases


@app.get("/optional-str")
async def read_optional_str(p: Annotated[str | None, Header()] = None):
    return {"p": p}

## 导入 `Path` { #import-path }

首先，从 `fastapi` 导入 `Path`，并导入 `Annotated`：

{* ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py hl[1,3] *}

/// info | 信息

FastAPI 在 0.95.0 版本添加了对 `Annotated` 的支持（并开始推荐使用它）。

如果你使用的是更旧的版本，尝试使用 `Annotated` 会报错。

请确保在使用 `Annotated` 之前，将 FastAPI 版本[升级](../deployment/versions.md#upgrading-the-fastapi-versions)到至少 0.95.1。

///