class Image(BaseModel):
    url: HttpUrl
    name: str


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()
    image: Image | None = None


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item):
    results = {"item_id": item_id, "item": item}

            "paths": {
                "/items/{item_id}": {
                    "get": {
                        "responses": {
                            "404": {"description": "Item not found"},
                            "302": {"description": "The item was moved"},
                            "403": {"description": "Not enough privileges"},
                            "200": {

constraints.URL.message = {item} non è un URL valido.
constraints.Required.message = {item} è richiesto.
constraints.TypeInteger.message = {item} deve essere un numero.
constraints.TypeLong.message = {item} deve essere un numero.
constraints.TypeFloat.message = {item} deve essere un numero.
constraints.TypeDouble.message = {item} deve essere un numero.
constraints.TypeAny.message = {item} non può essere convertito in {propertyType}.

constraints.URL.message = {item} n'est pas une URL valide.
constraints.Required.message = {item} est requis.
constraints.TypeInteger.message = {item} doit être un nombre.
constraints.TypeLong.message = {item} doit être un nombre.
constraints.TypeFloat.message = {item} doit être un nombre.
constraints.TypeDouble.message = {item} doit être un nombre.
constraints.TypeAny.message = {item} ne peut pas être converti en {propertyType}.

                        "title": "Body_update_item_items__item_id__put",
                        "required": ["item", "user", "importance"],
                        "type": "object",
                        "properties": {
                            "item": {"$ref": "#/components/schemas/Item"},
                            "user": {"$ref": "#/components/schemas/User"},
                            "importance": {

class Item(BaseModel):
    name: str
    price: float


class ResponseMessage(BaseModel):
    message: str


class User(BaseModel):
    username: str
    email: str


@app.post("/items/", response_model=ResponseMessage, tags=["items"])
async def create_item(item: Item):
    return {"message": "Item received"}

        "name": "Special Offer",
        "description": "This is a special offer",
        "price": 38.6,
        "items": [
            {
                "name": "Foo",
                "description": "A very nice Item",
                "price": 35.4,
                "tax": 3.2,
                "tags": ["foo"],
                "images": [
                    {
                        "url": "http://example.com/image.png",

                            },
                        },
                        "summary": "Read Item",
                        "operationId": "read_item_items__item_id__get",
                        "parameters": [
                            {
                                "required": True,
                                "schema": {"title": "Item Id", "type": "string"},
                                "name": "item_id",

sequenceDiagram
    participant App
    participant Client

    App->>App: Produce Item 1
    App->>Client: Send Item 1
    App->>App: Produce Item 2
    Client->>Client: Process Item 1
    App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...
```

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)