end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Rick", salutation="Mr.")
        function ->> execute: execute function code
        execute ->> code: return the result
    end

```Python
q: Annotated[str, Query(default="rick")] = "morty"
```

...porque não está claro se o valor padrão deveria ser `"rick"` ou `"morty"`.

Então, você usaria (preferencialmente):

```Python
q: Annotated[str, Query()] = "rick"
```

...ou em bases de código mais antigas você encontrará:

```Python
q: str = Query(default="rick")
```

application/x-gzip             gz tgz           # Gzip and Tar file
application/x-compress         z                # Gzip and Tar file
application/x-hdf              hdf              # NCSA HDF
application/x-ica              ica              # WinFrames
application/x-javascript       js               # Javascript
application/x-latex            latex            # Latex File
application/x-mif              mif              #

Essa parte é bastante normal, a maior parte do código provavelmente já é familiar para você:

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[7:11,34:51] *}

/// tip | Dica

O parâmetro de consulta `callback_url` usa um tipo Pydantic [Url](https://docs.pydantic.dev/latest/api/networks/).

///

│   ├── main.py
│   ├── dependencies.py
│   └── routers
│   │   ├── __init__.py
│   │   ├── items.py
│   │   └── users.py
│   └── internal
│       ├── __init__.py
│       └── admin.py
```

/// tip | Dica

Existem vários arquivos `__init__.py`: um em cada diretório ou subdiretório.

Isso permite a importação de código de um arquivo para outro.

Por exemplo, no arquivo `app/main.py`, você poderia ter uma linha como:

client = TestClient(app)


def test_get():
    response = client.get("/users/rick")
    assert response.status_code == 200, response.text
    assert response.json() == {"user_id": "rick", "path": "/users/{user_id}"}


def test_invalid_method_doesnt_match():
    response = client.post("/users/rick")
    assert response.status_code == 405, response.text


def test_invalid_path_doesnt_match():

    assert state["finally"] is False
    response = client.put("/invalid-user/rick", json="Morty")
    assert response.status_code == 400, response.text
    assert response.json() == {"detail": "Invalid user"}
    assert state["except"] is True
    assert state["finally"] is True
    assert fake_database["rick"] == "Rick Sanchez"


def test_dependency_no_exception():
    assert state["except"] is False

//// tab | Python 3.10+

```Python
commons: Annotated[CommonQueryParams, Depends(CommonQueryParams)]
```

////

//// tab | Python 3.10+ non-Annotated

/// tip | Dica

Utilize a versão com `Annotated` se possível.

///

```Python
commons: CommonQueryParams = Depends(CommonQueryParams)
```

////

O último `CommonQueryParams`, em:

```Python

from fastapi.responses import StreamingResponse

app = FastAPI()


message = """
Rick: (stumbles in drunkenly, and turns on the lights) Morty! You gotta come on. You got--... you gotta come with me.
Morty: (rubs his eyes) What, Rick? What's going on?
Rick: I got a surprise for you, Morty.
Morty: It's the middle of the night. What are you talking about?

data = {
    "plumbus": {"description": "Freshly pickled plumbus", "owner": "Morty"},
    "portal-gun": {"description": "Gun to create portals", "owner": "Rick"},
}


class OwnerError(Exception):
    pass


def get_username():
    try:
        yield "Rick"
    except OwnerError as e:
        raise HTTPException(status_code=400, detail=f"Owner error: {e}")


@app.get("/items/{item_id}")