@needs_py39
def test_users_token_jessica(client: TestClient):
    response = client.get("/users?token=jessica")
    assert response.status_code == 200
    assert response.json() == [{"username": "Rick"}, {"username": "Morty"}]


@needs_py39
def test_users_with_no_token(client: TestClient):
    response = client.get("/users")
    assert response.status_code == 422
    assert response.json() == IsDict(
        {

Следующий пример не рабочий:

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

...потому что нельзя однозначно определить, что именно должно быть значением по умолчанию: `"rick"` или `"morty"`.

Вам следует использовать (предпочтительно):

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

def test_users_token_jessica(client: TestClient):
    response = client.get("/users?token=jessica")
    assert response.status_code == 200
    assert response.json() == [{"username": "Rick"}, {"username": "Morty"}]


def test_users_with_no_token(client: TestClient):
    response = client.get("/users")
    assert response.status_code == 422
    assert response.json() == IsDict(
        {
            "detail": [

Zum Beispiel ist das nicht erlaubt:

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

... denn es wird nicht klar, ob der Defaultwert `"rick"` oder `"morty"` sein soll.

Sie würden also (bevorzugt) schreiben:

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

In älterem Code werden Sie auch finden:

    app = FastAPI()
    router = APIRouter()


    @router.get("/users/", tags=["users"])
    async def read_users():
        return [{"username": "Rick"}, {"username": "Morty"}]


    app.include_router(router)
    ```
    """

    def __init__(
        self,
        *,
        prefix: Annotated[str, Doc("An optional path prefix for the router.")] = "",

* Qualquer programa, qualquer código, **só pode fazer coisas** quando está sendo **executado**. Então, quando há um **processo em execução**.
* O processo pode ser **terminado** (ou "morto") por você, ou pelo sistema operacional. Nesse ponto, ele para de rodar/ser executado, e ele **não pode mais fazer coisas**.

```Python
from fastapi import Depends, FastAPI, HTTPException
from typing_extensions import Annotated

app = FastAPI()


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"

32B6          ; mapped                 ; 0034 0031     # 3.2  CIRCLED NUMBER FORTY ONE
32B7          ; mapped                 ; 0034 0032     # 3.2  CIRCLED NUMBER FORTY TWO
32B8          ; mapped                 ; 0034 0033     # 3.2  CIRCLED NUMBER FORTY THREE
32B9          ; mapped                 ; 0034 0034     # 3.2  CIRCLED NUMBER FORTY FOUR

?g&orf?ujb??i&dnaort?vnarg??kob?ladendua?maherk&a?å??n&it?urgsrop??orf-&dron?r&os?øs???r&aieb?evats??sfev?uaks?yrts??o&6axi-ygvtsev--nx?c,d&ob?rav??ievs?kssouf?l&m&ob?øb??ous&adna?ech&ac?áč???so!.sg???msdeks?niekotuak?r&egark?olf?y&oso?øso???s&dav?mort???p&ed?ohsdaerpsym,p&akdron?elk???r&a&d&dj&ab?áb??iab??jtif?luag?mah?vsyt??e&gn&a&k&iel?ro??merb?n&at?mas??rav-r&os?øs??srop?talf?v&ats?el??y&oh?øh???ivsgnok??il?jkniets?k&a&nvej?rem?s&gnir?nellu???ie-er&den?v&o?ø???ram?sa?årem??la&jf?vh??m&b&ah?á...

?g&orf?ujb??i&dnaort?vnarg??kob?ladendua?maherk&a?å??n&it?urgsrop??orf-&dron?r&os?øs???r&aieb?evats??sfev?uaks?yrts??o&6axi-ygvtsev--nx?c,d&ob?rav??ievs?kssouf?l&m&ob?øb??ous&adna?ech&ac?áč???so!.sg???msdeks?niekotuak?r&egark?olf?y&oso?øso???s&dav?mort???p&ed?ohsdaerpsym,p&akdron?elk???r&a&d&dj&ab?áb??iab??jtif?luag?mah?vsyt??e&gn&a&k&iel?ro??merb?n&at?mas??rav-r&os?øs??srop?talf?v&ats?el??y&oh?øh???ivsgnok??il?jkniets?k&a&nvej?rem?s&gnir?nellu???ie-er&den?v&o?ø???ram?sa?årem??la&jf?vh??m&b&ah?á...