## Importar `Cookie`

Primero importa `Cookie`:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[3]*}

## Declarar parámetros de `Cookie`

Luego declara los parámetros de cookie usando la misma estructura que con `Path` y `Query`.

El primer valor es el valor por defecto, puedes pasar todos los parámetros adicionales de validación o anotación:

    }

    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + eventType;
        result = prime * result + ((exception == null) ? 0 : exception.hashCode());
        result = prime * result + ((localFile == null) ? 0 : localFile.hashCode());
        result = prime * result + requestType;
        return result;
    }

	}
	return setupConfigdumpEnvoyConfigWriter(data, out)
}

func setupConfigdumpEnvoyConfigWriter(debug []byte, out io.Writer) (*configdump.ConfigWriter, error) {
	cw := &configdump.ConfigWriter{Stdout: out}
	err := cw.Prime(debug)
	if err != nil {
		return nil, err
	}
	return cw, nil
}

func setupEnvoyClusterStatsConfig(kubeClient kube.CLIClient, podName, podNamespace string, outputFormat string) (string, error) {

			expectedOut, err := io.ReadAll(outFile)
			if err != nil {
				t.Errorf("error reading test data output file: %v", err)
			}

			gotOut := &bytes.Buffer{}
			cw := &ConfigWriter{Stdout: gotOut}
			err = cw.Prime(configDump)
			assert.NoError(t, err)
			err = cw.PrintSecretSummary()
			assert.NoError(t, err)

			assert.Equal(t, string(expectedOut), gotOut.String())
		})
	}

                }
            }
        }
        return decoded;
    }

    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((getId() == null) ? 0 : getId().hashCode());
        return result;
    }

    public boolean equals(Object obj) {
        if (this == obj) {
            return true;

    ImmutableDoubleArray trimmed = iia.trimmed();
    assertThat(trimmed).isNotSameInstanceAs(iia);

    // Yes, this is apparently how you check array equality in Truth
    assertThat(trimmed.toArray()).isEqualTo(iia.toArray());
  }

  private static void assertDoesntActuallyTrim(ImmutableDoubleArray iia) {
    assertThat(iia.trimmed()).isSameInstanceAs(iia);
  }

  @J2ktIncompatible

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial008.py!}
```

////

This means:

* The variable `prices` is a `dict`:
    * The keys of this `dict` are of type `str` (let's say, the name of each item).
    * The values of this `dict` are of type `float` (let's say, the price of each item).

#### Union

You can declare that a variable can be any of **several types**, for example, an `int` or a `str`.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


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


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

```JSON
{
    "name": "Foo",
    "description": "An optional description",
    "price": 45.2,
    "tax": 3.5
}
```

...`description` et `tax` étant des attributs optionnels (avec `None` comme valeur par défaut), cet "objet" JSON serait aussi valide :

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## Déclarez-le comme paramètre

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


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


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):