### Burger Conclusion { #burger-conclusion }

In this scenario of "fast food burgers with your crush", as there is a lot of waiting 🕙, it makes a lot more sense to have a concurrent system ⏸🔀⏯.

This is the case for most of the web applications.

Many, many users, but your server is waiting 🕙 for their not-so-good connection to send their requests.

And then waiting 🕙 again for the responses to come back.

Ama *eşzamanlılık* ve *paralellik* arasındaki ayrıntılar oldukça farklıdır.

Farkı görmek için burgerlerle ilgili şu hikayeyi hayal edin:

### Eşzamanlı Burgerler { #concurrent-burgers }

Aşkınla fast food almaya gidiyorsun, kasiyer senden önceki insanların siparişlerini alırken sıraya giriyorsun. 😍

<img src="/img/async/concurrent-burgers/concurrent-burgers-01.png" class="illustration">

### Parallele Hamburger { #parallel-burgers }

Stellen wir uns jetzt vor, dass es sich hierbei nicht um „nebenläufige Hamburger“, sondern um „parallele Hamburger“ handelt.

Sie gehen los mit Ihrem Schwarm, um paralleles Fast Food zu bekommen.

Sie stehen in der Schlange, während mehrere (sagen wir acht) Kassierer, die gleichzeitig Köche sind, die Bestellungen der Leute vor Ihnen entgegennehmen.

fly
fly.dev
flå.no
fm
fm.br
fm.it
fm.jo
fm.no
fnc.fr-par.scw.cloud
fnd.br
fnwk.site
fo
foggia.it
folionetwork.site
folkebibl.no
folldal.no
foo
food
fool.jp
football
for-better.biz
for-more.biz
for-our.info
for-some.biz
for-the.biz
ford
forde.no
forex
forgeblocks.com
forgot.her.name
forgot.his.name

fly
fly.dev
flå.no
fm
fm.br
fm.it
fm.jo
fm.no
fnc.fr-par.scw.cloud
fnd.br
fnwk.site
fo
foggia.it
folionetwork.site
folkebibl.no
folldal.no
foo
food
fool.jp
football
for-better.biz
for-more.biz
for-our.info
for-some.biz
for-the.biz
ford
forde.no
forex
forgeblocks.com
forgot.her.name
forgot.his.name

// Opts contains options for the cache.
type Opts struct {
	// When set to true, return the last cached value
	// even if updating the value errors out.
	// Returns the last good value AND the error.
	ReturnLastGood bool

	// If NoWait is set, Get() will return the last good value,
	// if TTL has expired but 2x TTL has not yet passed,
	// but will fetch a new value in the background.
	NoWait bool
}

        assert response.status_code == 200
        assert response.json() == {"message": "all good?"}


def test_broken_return_finishes():
    client = TestClient(app, raise_server_exceptions=False)
    response = client.get("/broken")
    assert response.status_code == 200

The same way, there are many compatible tools. Including code generation tools for many languages.

## Pydantic { #pydantic }

All the data validation is performed under the hood by [Pydantic](https://docs.pydantic.dev/), so you get all the benefits from it. And you know you are in good hands.

You can use the same type declarations with `str`, `float`, `bool` and many other complex data types.

Onayınızı almak için bunca çaba harcayan zavallı cookie banner'ları... <dfn title="Bu da başka bir şaka. Dikkate almayın. Cookie'niz için biraz kahve alın. ☕">API'nin bunu reddetmesi için</dfn>. 🍪

    # to support it as a first class "feature"
    assert is_bytes_sequence_annotation(list[str] | list[bytes])


def test_is_uploadfile_sequence_annotation():
    # For coverage
    # TODO: in theory this would allow declaring types that could be lists of UploadFile
    # and other types, but I'm not even sure it's a good idea to support it as a first
    # class "feature"