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


class User(BaseModel):
    username: str
    full_name: str | None = None


@app.put("/items/{item_id}")
async def update_item(
    *,
    item_id: int,
    item: Item,
    user: User,
    importance: int = Body(gt=0),
    q: str | None = None,
):

        metadata.put(key, values);
    }

    /**
     * Puts a single value for a given key in the metadata.
     *
     * @param key the metadata key
     * @param value the value to associate with the key
     */
    public void putValue(final String key, final String value) {
        metadata.put(key, new String[] { value });
    }

    /**

         */
        for (Metadata metadata : request.getMetadata()) {
            if (metadata instanceof RemoteSnapshotMetadata snapshotMetadata) {
                snapshots.put(snapshotMetadata.getKey(), snapshotMetadata);
            }
        }
    }

    @Override
    public Collection<? extends Metadata> prepare(Collection<? extends Artifact> artifacts) {

            Map<String, Object> options = new HashMap<>();
            options.put(ModelProcessor.IS_STRICT, strict);
            options.put(ModelProcessor.INPUT_SOURCE, source);
            options.put(ModelProcessor.SOURCE, modelSource);

            try {
                model = modelProcessor.read(modelSource.getInputStream(), options);

     * Stores a parameter value with the specified key.
     *
     * @param key the parameter key, must not be null
     * @param value the parameter value, may be null
     */
    public void put(final String key, final Object value) {
        params.put(key, value);
    }

    /**
     * Retrieves a parameter value by key.
     *
     * @param key the parameter key to look up
     * @return the parameter value if found, null otherwise

            lifecycle
                    .getLifecyclePhases()
                    .forEach((phase, lifecyclePhase) -> parseLifecyclePhaseDefinitions(plugins, phase, lifecyclePhase));
            lfs.put(id, PluginContainer.newBuilder().plugins(plugins.values()).build());
        });
        return lfs;
    }

    static void parseLifecyclePhaseDefinitions(Map<String, Plugin> plugins, String phase, LifecyclePhase goals) {

# Request Parameters

Here's the reference information for the request parameters.

These are the special functions that you can put in *path operation function* parameters or dependency functions with `Annotated` to get data from the request.

It includes:

* `Query()`
* `Path()`
* `Body()`
* `Cookie()`
* `Header()`
* `Form()`
* `File()`

You can import them all directly from `fastapi`:

```python

from pydantic import BaseModel

app = FastAPI()


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


@app.put("/items/{item_id}")
async def update_item(
    *,
    item_id: int,
    item: Annotated[
        Item,
        Body(
            examples=[
                {
                    "name": "Foo",

            }

            defaultBindings = new LinkedHashMap<>(len / 2);

            for (int i = 0; i < len; i += 2) {
                defaultBindings.put(pluginBindings[i], new LifecyclePhase(pluginBindings[i + 1]));
            }
        }

        this.lifecycle = new Lifecycle(
                id,
                Collections.unmodifiableList(Arrays.asList(phases)),

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[Union[str, None], Body()] = None,
    size: Annotated[Union[int, None], Body()] = None,
):
    if item_id in items: