Comencemos con un ejemplo simple:

```Python
{!../../../docs_src/python_types/tutorial001.py!}
```

Llamar este programa nos muestra el siguiente <abbr title="en español: salida">output</abbr>:

```
John Doe
```

La función hace lo siguiente:

* Toma un `first_name` y un `last_name`.
* Convierte la primera letra de cada uno en una letra mayúscula con `title()`.

SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30


fake_users_db = {
    "johndoe": {
        "username": "johndoe",
        "full_name": "John Doe",
        "email": "******@****.***",
        "hashed_password": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
        "disabled": False,
    }
}


class Token(BaseModel):

    response = client.get("/users/me", headers={"Authorization": "Bearer johndoe"})
    assert response.status_code == 200, response.text
    assert response.json() == {
        "username": "johndoe",
        "full_name": "John Doe",
        "email": "******@****.***",
        "hashed_password": "fakehashedsecret",
        "disabled": False,
    }


@needs_py39
def test_incorrect_token(client: TestClient):

## Motivations

Prenons un exemple simple :

```Python
{!../../../docs_src/python_types/tutorial001.py!}
```

Exécuter ce programe affiche :

```
John Doe
```

La fonction :

* Prend un `first_name` et un `last_name`.
* Convertit la première lettre de chaque paramètre en majuscules grâce à `title()`.
* Concatène les résultats avec un espace entre les deux.

SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30


fake_users_db = {
    "johndoe": {
        "username": "johndoe",
        "full_name": "John Doe",
        "email": "******@****.***",
        "hashed_password": "$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW",
        "disabled": False,
    },
    "alice": {
        "username": "alice",

      <name>Brett Porter</name>
      <id>brett</id>
      <email>******@****.***</email>
      <roles>
        <role>Developer</role>
      </roles>
    </developer>
    <developer>
      <name>John Casey</name>
      <id>jdcasey</id>
      <email>******@****.***</email>
      <roles>
        <role>Developer</role>
      </roles>
    </developer>
    <developer>
      <name>Andrew Williams</name>

!!! note "참고"
    파이썬에 능숙하셔서 타입 힌트에 대해 모두 아신다면, 다음 챕터로 건너뛰세요.

## 동기 부여

간단한 예제부터 시작해봅시다:

```Python
{!../../../docs_src/python_types/tutorial001.py!}
```

이 프로그램을 실행한 결과값:

```
John Doe
```

함수는 아래와 같이 실행됩니다:

* `first_name`과 `last_name`를 받습니다.
* `title()`로 각 첫 문자를 대문자로 변환시킵니다.
* 두 단어를 중간에 공백을 두고 <abbr title="두 개를 하나로 차례차례 이어지게 하다">연결</abbr>합니다.

```Python hl_lines="2"

      <name>Brett Porter</name>
      <id>brett</id>
      <email>******@****.***</email>
      <roles>
        <role>Developer</role>
      </roles>
    </developer>
    <developer>
      <name>John Casey</name>
      <id>jdcasey</id>
      <email>******@****.***</email>
      <roles>
        <role>Developer</role>
      </roles>
    </developer>
  </developers>
  <dependencies>

			// the TCP fast open connect. This feature is supported
			// since Linux 4.11.
			_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, unix.TCP_FASTOPEN_CONNECT, 1)

			// Enable TCP quick ACK, John Nagle says
			// "Set TCP_QUICKACK. If you find a case where that makes things worse, let me know."
			_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, unix.TCP_QUICKACK, 1)

	}
	return
}

// Or add OR conditions
//
// Or is used to chain together queries with an OR.
//
//	// Find the first user with name equal to jinzhu or john
//	db.Where("name = ?", "jinzhu").Or("name = ?", "john").First(&user)
func (db *DB) Or(query interface{}, args ...interface{}) (tx *DB) {
	tx = db.getInstance()
	if conds := tx.Statement.BuildCondition(query, args...); len(conds) > 0 {