"post": {
                    "tags": ["items"],
                    "summary": "Create Item",
                    "operationId": "items-create_item",
                    "requestBody": {
                        "content": {
                            "application/json": {
                                "schema": {"$ref": "#/components/schemas/Item"}
                            }
                        },

                        <ol class="breadcrumb float-sm-right">
                            <li class="breadcrumb-item"><la:link href="/admin/dict">
                                <la:message key="labels.dict_list_link"/>
                            </la:link></li>
                            <li class="breadcrumb-item"><la:message key="labels.dict_stemmeroverride_list_link"/></li>
                        </ol>
                    </div>

                    }
                    return null;
                } finally {
                    item.setNewInputs(null);
                    item.setNewOutputs(null);
                }
            } catch (final IOException e) {
                throw new DictionaryException("Failed to write: " + oldItem + " -> " + item, e);
            }

from fastapi import FastAPI
from pydantic import BaseModel


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item):

                                    "anyOf": [{"type": "string"}, {"type": "null"}],
                                    "title": "Item Id",
                                }
                            )
                            # TODO: remove when deprecating Pydantic v1
                            | IsDict({"title": "Item Id", "type": "string"}),
                        }
                    ],
                }
            },

                                    "schema": {"$ref": "#/components/schemas/Item"}
                                }
                            },
                        }
                    },
                }
            }
        },
        "components": {
            "schemas": {
                "Item": {
                    "title": "Item",
                    "required": IsOneOf(

                )
            )


def resolve_files(*, items: List[Any], files: Files, config: MkDocsConfig) -> None:
    for item in items:
        if isinstance(item, str):
            resolve_file(item=item, files=files, config=config)
        elif isinstance(item, dict):
            assert len(item) == 1
            values = list(item.values())
            if not values:
                continue

from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item):

    }


def test_encode_dataclass():
    item = Item(name="foo", count=100)
    assert jsonable_encoder(item) == {"name": "foo", "count": 100}
    assert jsonable_encoder(item, include={"name"}) == {"name": "foo"}
    assert jsonable_encoder(item, exclude={"count"}) == {"name": "foo"}
    assert jsonable_encoder(item, include={}) == {}
    assert jsonable_encoder(item, exclude={}) == {"name": "foo", "count": 100}

from fastapi.encoders import jsonable_encoder
from pydantic import BaseModel

fake_db = {}


class Item(BaseModel):
    title: str
    timestamp: datetime
    description: str | None = None


app = FastAPI()


@app.put("/items/{id}")
def update_item(id: str, item: Item):
    json_compatible_item_data = jsonable_encoder(item)