```JSON
{
  "item": "The Foo Wrestlers"
}
```

Але якщо клієнт робить запит на `http://example.com/items/bar` (де `item_id` має не існуюче значення `"bar"`), то отримає статус-код 404 (помилка "не знайдено") та відповідь:

```JSON
{
  "detail": "Item not found"
}
```

/// tip | Порада

                    "parameters": [
                        {
                            "required": True,
                            "schema": {
                                "title": "The ID of the item to get",
                                "type": "integer",
                                "minimum": 1,
                            },
                            "name": "item_id",
                            "in": "path",

                                "content": {"application/json": {"schema": {}}},
                            }
                        },
                        "summary": "Read System Status",
                        "operationId": "read_system_status_status__get",
                        "security": [{"OAuth2PasswordBearer": []}],
                    }
                },
            },

                    "parameters": [
                        {
                            "required": True,
                            "schema": {
                                "title": "The ID of the item to get",
                                "type": "integer",
                                "exclusiveMinimum": 0,
                                "maximum": 1000,
                            },

	if s.pos >= atomic.LoadInt64(&s.end) {
		return nullByte
	}
	s.ipos++

	if s.ipos > s.ifill { // internal buffer is exhausted
		s.ifill = <-s.fillReady

		s.buf[0] = s.buf[len(s.buf)-1] // copy current last item to guarantee lookback
		copy(s.buf[1:], s.nbuf[:])     // copy contents of pre-filled next buffer
		s.ipos = 1                     // move to beginning of internal buffer

		// request next fill to be prepared

    }

    /**
     * Create a StopwordsItem from the form data.
     *
     * @param form the create form containing the item data
     * @param hook the validation error hook
     * @return optional entity containing the created stopwords item
     */
    public static OptionalEntity<StopwordsItem> createStopwordsItem(final CreateForm form, final VaErrorHook hook) {

{* ../../docs_src/generate_clients/tutorial001_py39.py hl[7:9,12:13,16:17,21] *}

Notice that the *path operations* define the models they use for request payload and response payload, using the models `Item` and `ResponseMessage`.

### API Docs { #api-docs }

If you go to `/docs`, you will see that it has the **schemas** for the data to be sent in requests and received in responses:

    /**
     * Get the value for the key 'job.system.property.filter.pattern'. <br>
     * The value is, e.g.  <br>
     * comment: Pattern to filter system properties for jobs.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getJobSystemPropertyFilterPattern();

    /**
     * Get the value for the key 'job.system.property.filter.pattern' as {@link Integer}. <br>

        from pydantic import BaseModel

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

        app = FastAPI()
        router = APIRouter()

        @router.put("/items/{item_id}")
        def replace_item(item_id: str, item: Item):
            return {"message": "Item replaced", "id": item_id}

        app.include_router(router)

<div class="wrapper">
    <jsp:include page="/WEB-INF/view/common/admin/header.jsp"></jsp:include>
    <jsp:include page="/WEB-INF/view/common/admin/sidebar.jsp">
        <jsp:param name="menuCategoryType" value="system"/>
        <jsp:param name="menuType" value="general"/>
    </jsp:include>
    <main class="content-wrapper">
        <div class="content-header">
            <div class="container-fluid">