@app.put("/items/{item_id}")
async def read_items(
    item_id: UUID,
    start_datetime: datetime = Body(),
    end_datetime: datetime = Body(),
    process_after: timedelta = Body(),
    repeat_at: Union[time, None] = Body(default=None),
):
    start_process = start_datetime + process_after
    duration = end_datetime - start_process
    return {
        "item_id": item_id,
        "start_datetime": start_datetime,

from fastapi import Depends, FastAPI, Request, Response
from fastapi.testclient import TestClient

legacy_request_state_context_var: ContextVar[Optional[Dict[str, Any]]] = ContextVar(
    "legacy_request_state_context_var", default=None
)

app = FastAPI()


async def set_up_request_state_dependency():
    request_state = {"user": "deadpond"}
    contextvar_token = legacy_request_state_context_var.set(request_state)
    yield request_state

                            {"title": "Description", "type": "string"}
                        ),
                        "tax": {"title": "Tax", "type": "number", "default": 10.5},
                    },
                },
                "ValidationError": {
                    "title": "ValidationError",
                    "required": ["loc", "msg", "type"],

                        "username": {"title": "Username", "type": "string"},
                        "password": {"title": "Password", "type": "string"},
                        "scope": {"title": "Scope", "type": "string", "default": ""},
                        "client_id": IsDict(
                            {
                                "title": "Client Id",
                                "anyOf": [{"type": "string"}, {"type": "null"}],

                        "username": {"title": "Username", "type": "string"},
                        "password": {"title": "Password", "type": "string"},
                        "scope": {"title": "Scope", "type": "string", "default": ""},
                        "client_id": IsDict(
                            {
                                "title": "Client Id",
                                "anyOf": [{"type": "string"}, {"type": "null"}],

                have their default values. This is different from
                `response_model_exclude_defaults` in that if the fields are set,
                they will be included in the response, even if the value is the same
                as the default.

                When `True`, default values are omitted from the response.

                Read more about it in the

            exclude_none=exclude_none,
            exclude_defaults=exclude_defaults,
        )
        if "__root__" in obj_dict:
            obj_dict = obj_dict["__root__"]
        return jsonable_encoder(
            obj_dict,
            exclude_none=exclude_none,
            exclude_defaults=exclude_defaults,
            # TODO: remove when deprecating Pydantic v1
            custom_encoder=encoders,

            exclude_unset=exclude_unset,
            exclude_defaults=exclude_defaults,
            exclude_none=exclude_none,
        )
    elif isinstance(res, list):
        return [
            _prepare_response_content(
                item,
                exclude_unset=exclude_unset,
                exclude_defaults=exclude_defaults,
                exclude_none=exclude_none,
            )

                Annotated[self.field_info.annotation, self.field_info]
            )

        def get_default(self) -> Any:
            if self.field_info.is_required():
                return Undefined
            return self.field_info.get_default(call_default_factory=True)

        def validate(
            self,
            value: Any,
            values: Dict[str, Any] = {},  # noqa: B006
            *,

    swagger_ui_parameters: Annotated[
        Optional[Dict[str, Any]],
        Doc(
            """
            Configuration parameters for Swagger UI.

            It defaults to [swagger_ui_default_parameters][fastapi.openapi.docs.swagger_ui_default_parameters].
            """
        ),
    ] = None,
) -> HTMLResponse:
    """
    Generate and return the HTML  that loads Swagger UI for the interactive