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.

    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

    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。

///

from typing import Annotated

from fastapi import Body, FastAPI, status
from fastapi.responses import JSONResponse

app = FastAPI()

items = {"foo": {"name": "Fighters", "size": 6}, "bar": {"name": "Tenders", "size": 3}}


@app.put("/items/{item_id}")
async def upsert_item(
    item_id: str,
    name: Annotated[str | None, Body()] = None,
    size: Annotated[int | None, Body()] = None,
):
    if item_id in items:

## `Path`のインポート { #import-path }

まず初めに、`fastapi`から`Path`をインポートし、`Annotated`もインポートします:

{* ../../docs_src/path_params_numeric_validations/tutorial001_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（そして推奨し始めました）。

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。

`Annotated`を使用する前に、FastAPI のバージョンを少なくとも 0.95.1 まで[アップグレードしてください](../deployment/versions.md#upgrading-the-fastapi-versions)。

    </body>
</html>
"""


@app.get("/")
async def get():
    return HTMLResponse(html)


async def get_cookie_or_token(
    websocket: WebSocket,
    session: Annotated[str | None, Cookie()] = None,
    token: Annotated[str | None, Query()] = None,
):
    if session is None and token is None:
        raise WebSocketException(code=status.WS_1008_POLICY_VIOLATION)
    return session or token

@app.get("/partial-function-dependency")
async def get_partial_function_dependency(
    value: Annotated[
        str, Depends(partial(function_dependency, "partial-function-dependency"))
    ],
) -> str:
    return value


@app.get("/partial-async-function-dependency")
async def get_partial_async_function_dependency(
    value: Annotated[
        str,
        Depends(