## A "callable" instance { #a-callable-instance }

In Python there's a way to make an instance of a class a "callable".

Not the class itself (which is already a callable), but an instance of that class.

To do that, we declare a method `__call__`:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[12] *}

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

/**
 * Test class for SmbNegotiationRequest interface
 */
@ExtendWith(MockitoExtension.class)
class SmbNegotiationRequestTest {

    @Mock
    private SmbNegotiationRequest negotiationRequest;

    private SmbNegotiationRequest customImplementation;

    @BeforeEach

**FastAPI** 🤝 👆 📄:

### ⚓️ 🔛 📂 🐩

* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>🗄</strong></a> 🛠️ 🏗, ✅ 📄 <abbr title="also known as: endpoints, routes">➡</abbr> <abbr title="also known as HTTP methods, as POST, GET, PUT, DELETE">🛠️</abbr>, 🔢, 💪 📨, 💂‍♂, ♒️.
* 🏧 📊 🏷 🧾 ⏮️ <a href="https://json-schema.org/" class="external-link" target="_blank"><strong>🎻 🔗</strong></a> (🗄 ⚫️ 🧢 🔛 🎻 🔗).

### Kontrol Edelim

Tarayıcınızı açıp <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a> bağlantısına gidin.

Şu şekilde bir JSON yanıtı ile karşılaşacağız:

```JSON
{"message": "Hello World"}
```

### Etkileşimli API Dokümantasyonu

Şimdi <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a> bağlantısını açalım.

 *
 * @author mbechler
 *
 */
public class Smb2QueryDirectoryRequest extends ServerMessageBlock2Request<Smb2QueryDirectoryResponse> implements RequestWithFileId {

    /**
     * File information class for basic directory information.
     */
    public static final byte FILE_DIRECTORY_INFO = 0x1;

    /**
     * File information class for full directory information.
     */

In **SQLModel**, any model class that has `table=True` is a **table model**.

And any model class that doesn't have `table=True` is a **data model**, these ones are actually just Pydantic models (with a couple of small extra features). 🤓

With SQLModel, we can use **inheritance** to **avoid duplicating** all the fields in all the cases.

#### `HeroBase` - the base class { #herobase-the-base-class }

## Instalación

Crea y activa un <a href="https://fastapi.tiangolo.com/virtual-environments/" class="external-link" target="_blank">entorno virtual</a> y luego instala FastAPI:

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

**Typer** é o irmão menor do FastAPI. E seu propósito é ser o **FastAPI das _CLIs_**. ⌨️ 🚀

## Requisitos

FastAPI está nos ombros de gigantes:

* <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> para as partes web.

	</c:if>
</h3>
<div class="card-tools">
	<c:choose>
		<c:when test="${crudMode == null}">
			<la:link href="createnew" styleClass="btn btn-success btn-xs ${f:h(editableClass)}">
				<em class="fa fa-plus">
				<la:message key="labels.crud_link_create" />
			</la:link>
		</c:when>
		<c:otherwise>
			<la:link href="../list" styleClass="btn btn-primary btn-xs">
				<em class="fa fa-th-list">

            entity.setLastUpdated(System.currentTimeMillis());
        }
    }

    // Simple mock class without complex interface requirements
    private static class MockLaCron implements LaCron {
        @Override
        public org.lastaflute.job.subsidiary.RegisteredJob register(String cronExp, Class<? extends org.lastaflute.job.LaJob> jobType,