then it is a "callable".

## Classes as dependencies

You might notice that to create an instance of a Python class, you use that same syntax.

For example:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

In this case, `fluffy` is an instance of the class `Cat`.

And to create `fluffy`, you are "calling" `Cat`.

		`(?:[[:^punct:]]*/*)*crio[[:punct:]]` +
		// non-punctuation end of string, i.e., the container ID
		`(?P<containerid>[[:^punct:]]+)$`),
}

func reSubMatchMap(r *regexp.Regexp, str string) map[string]string {
	match := r.FindStringSubmatch(str)
	if match == nil {
		return nil
	}
	subMatchMap := make(map[string]string)
	for i, name := range r.SubexpNames() {
		if i != 0 {
			subMatchMap[name] = match[i]
		}
	}

Se você rodar os exemplos com, por exemplo:

<div class="termy">

```console
$ uvicorn tutorial001:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

como Uvicorn utiliza por padrão a porta `8000`, a documentação na porta `8008` não dará conflito.

### Traduções

Para isso, nós atualizamos o modelo Pydantic `TokenData` com a nova propriedade `scopes`.

Ao validar os dados com o Pydantic nós podemos garantir que temos, por exemplo, exatamente uma `list` de `str` com os escopos e uma `str` com o `username`.

No lugar de, por exemplo, um `dict`, ou alguma outra coisa, que poderia quebrar a aplicação em algum lugar mais tarde, tornando isso um risco de segurança.

<font color="#4E9A06">INFO</font>:     Will watch for changes in these directories: [&apos;/home/user/code/awesomeapp&apos;]
<font color="#4E9A06">INFO</font>:     Uvicorn running on <b>http://127.0.0.1:8000</b> (Press CTRL+C to quit)
<font color="#4E9A06">INFO</font>:     Started reloader process [<font color="#34E2E2"><b>2265862</b></font>] using <font color="#34E2E2"><b>WatchFiles</b></font>

                    "ctx": {"pattern": "^fixedquery$"},
                    "loc": ["query", "item-query"],
                    "msg": 'string does not match regex "^fixedquery$"',
                    "type": "value_error.str.regex",
                }
            ]
        }
    )


@needs_py39
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

	b.ReportAllocs()
	str := strings.Repeat("x", 16<<10)
	for i := 0; i < b.N; i++ {
		br := NewReader(strings.NewReader(str))
		n, err := io.Copy(io.Discard, br)
		if err != nil {
			b.Fatal(err)
		}
		if n != int64(len(str)) {
			b.Fatal("wrong length")
		}
	}
}

func BenchmarkWriterEmpty(b *testing.B) {
	b.ReportAllocs()
	str := strings.Repeat("x", 1<<10)

🙆 💼, 👆 🔜 🏃 ⚫️ 💖 👉:

<div class="termy">

```console
$ uvicorn main:app --host 0.0.0.0 --port 8080 --workers 4
<font color="#A6E22E">INFO</font>:     Uvicorn running on <b>http://0.0.0.0:8080</b> (Press CTRL+C to quit)
<font color="#A6E22E">INFO</font>:     Started parent process [<font color="#A1EFE4"><b>27365</b></font>]
<font color="#A6E22E">INFO</font>:     Started server process [<font color="#A1EFE4">27368</font>]

項目を更新するには<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PUT" class="external-link" target="_blank">HTTPの`PUT`</a>操作を使用することができます。

`jsonable_encoder`を用いて、入力データをJSON形式で保存できるデータに変換することができます（例：NoSQLデータベース）。例えば、`datetime`を`str`に変換します。

```Python hl_lines="30 31 32 33 34 35"
{!../../docs_src/body_updates/tutorial001.py!}
```

既存のデータを置き換えるべきデータを受け取るために`PUT`は使用されます。

### 置換についての注意

つまり、`PUT`を使用して以下のボディで項目`bar`を更新したい場合は:

from datetime import datetime
from typing import List, Optional

from fastapi import FastAPI
from fastapi.testclient import TestClient

app = FastAPI()


@dataclass
class Item:
    name: str
    date: datetime
    price: Optional[float] = None
    owner_ids: Optional[List[int]] = None


@app.get("/items/valid", response_model=Item)
def get_valid():