# Usando Dataclasses { #using-dataclasses }

FastAPI é construído em cima do **Pydantic**, e eu tenho mostrado como usar modelos Pydantic para declarar requisições e respostas.

Mas o FastAPI também suporta o uso de <a href="https://docs.python.org/3/library/dataclasses.html" class="external-link" target="_blank">`dataclasses`</a> da mesma forma:

{* ../../docs_src/dataclasses_/tutorial001_py310.py hl[1,6:11,18:19] *}

import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

import eu.maveniverse.domtrip.Document;
import eu.maveniverse.domtrip.Editor;
import eu.maveniverse.domtrip.Element;
import org.apache.maven.api.cli.mvnup.UpgradeOptions;
import org.apache.maven.cling.invoker.mvnup.UpgradeContext;
import org.junit.jupiter.api.BeforeEach;

	err := w.WriteHeader(&Header{
		Name: "lorem.txt",
		Mode: 0600,
		Size: int64(len(inp)),

 * under the License.
 */
package org.apache.maven.cling.invoker.mvnup.goals;

import java.nio.file.Path;
import java.util.Map;
import java.util.Optional;

import eu.maveniverse.domtrip.Document;
import org.apache.maven.api.cli.mvnup.UpgradeOptions;
import org.apache.maven.cling.invoker.mvnup.UpgradeContext;

/**
 * Strategy interface for different types of upgrade operations.

cr: ᓀᐦᐃᔭᐍᐏᐣ
cs: čeština
cu: ѩзыкъ словѣньскъ
cv: чӑваш чӗлхи
cy: Cymraeg
da: dansk
de: Deutsch
dv: Dhivehi
dz: རྫོང་ཁ
ee: Eʋegbe
el: Ελληνικά
en: English
eo: Esperanto
es: español
et: eesti
eu: euskara
fa: فارسی
ff: Fulfulde
fi: suomi
fj: Vakaviti
fo: føroyskt
fr: français
fy: Frysk
ga: Gaeilge
gd: Gàidhlig
gl: galego
gu: ગુજરાતી
gv: Gaelg
ha: هَوُسَ
he: עברית
hi: हिन्दी

        .build()

    // An example test URL that returns client certificate details.
    val request =
      Request
        .Builder()
        .url("https://prod.idrix.eu/secure/")
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

      println(response.body.string())
    }
  }

import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import eu.maveniverse.maven.mimir.testing.MimirInfuser;
import org.apache.maven.api.cli.Invoker;
import org.apache.maven.api.cli.InvokerException;
import org.apache.maven.api.cli.Parser;
import org.apache.maven.api.cli.ParserRequest;

                <descriptor>src/assembly/bin.xml</descriptor>
              </descriptors>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>eu.maveniverse.maven.plugins</groupId>
        <artifactId>bom-builder3</artifactId>
        <version>1.3.1</version>
        <executions>
          <execution>
            <id>skinny-bom</id>
            <goals>

#!/bin/bash -eu
# Copyright 2016 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,

          + "elementum ullamcorper mattis viverra, dictum sit amet lacus.\n"
          + "\n"
          + "Nunc quis lacus est. Sed aliquam pretium cursus. Sed eu libero eros. In hac habitasse "
          + "platea dictumst. Pellentesque molestie, nibh nec iaculis luctus, justo sem lobortis "
          + "enim, at feugiat leo magna nec libero. Mauris quis odio eget nisl rutrum cursus nec "