```
INFO: Sending request http://www.publicobject.com/helloworld.txt on Connection{www.publicobject.com:80, proxy=DIRECT hostAddress=54.187.32.157 cipherSuite=none protocol=http/1.1}
User-Agent: OkHttp Example
Host: www.publicobject.com
Connection: Keep-Alive
Accept-Encoding: gzip

    </description>
  </expression>
  <expression>
    <syntax>project.parent</syntax>
    <configuration>
      <![CDATA[
<parent>
  <groupId>project.group</groupId>
  <artifactId>project-artifact</artifactId>
  <version>0.0.0.0</version>
</parent>
    ]]></configuration>
    <description> This is the MavenProject instance for the parent of the current POM.
    </description>
  </expression>
  <expression>

Nesse caso, você pode simplesmente trocar as `dataclasses` padrão por `pydantic.dataclasses`, que é um substituto direto:

{* ../../docs_src/dataclasses_/tutorial003_py310.py hl[1,4,7:10,13:16,22:24,27] *}

1. Ainda importamos `field` das `dataclasses` padrão.

2. `pydantic.dataclasses` é um substituto direto para `dataclasses`.

3. A dataclass `Author` inclui uma lista de dataclasses `Item`.

En ese caso, simplemente puedes intercambiar los `dataclasses` estándar con `pydantic.dataclasses`, que es un reemplazo directo:

{* ../../docs_src/dataclasses_/tutorial003_py310.py hl[1,4,7:10,13:16,22:24,27] *}

1. Todavía importamos `field` de los `dataclasses` estándar.

2. `pydantic.dataclasses` es un reemplazo directo para `dataclasses`.

3. El dataclass `Author` incluye una lista de dataclasses `Item`.

                }
            }
        } catch (Exception e) {
            log.debug("Cached directory listing failed, falling back to direct query", e);
        }
        
        // Fall back to direct server query
        return directory.performDirectEnumeration();
    }
}
```

## 10. Monitoring and Metrics

### 10.1 Directory Cache Statistics

          "",
        )
      },
    ).containsExactly(
      "callStart: Request{method=GET, url=http://google.com/robots.txt}",
      "proxySelectStart: http://google.com/",
      "proxySelectEnd: [DIRECT]",
      "dnsStart: google.com",
      "callFailed: java.net.UnknownHostException: shortcircuit",
    )
    // We should consider if these logs should retain Exceptions
    assertThat(logs.last().throwable).isNull()

    }

    /**
     * Test protected field access
     */
    public void test_protectedFieldAccess() {
        // Test direct field access (protected fields)
        TestAbstractRule rule = new TestAbstractRule();

        // Direct field assignment
        rule.ruleId = "directFieldAccess";
        TestResponseProcessor processor = new TestResponseProcessor();

                                    <label for="doc.digest" class="col-sm-3 text-sm-right col-form-label">digest</label>
                                    <div class="col-sm-9">
                                        <la:errors property="doc.digest"/>
                                        <la:text styleId="doc.digest" property="doc.digest" styleClass="form-control"/>
                                    </div>

# Historia, Diseño y Futuro { #history-design-and-future }

Hace algún tiempo, <a href="https://github.com/fastapi/fastapi/issues/3#issuecomment-454956920" class="external-link" target="_blank">un usuario de **FastAPI** preguntó</a>:

> ¿Cuál es la historia de este proyecto? Parece haber surgido de la nada y ser increíble en pocas semanas [...]

Aquí hay un poquito de esa historia.

## Alternativas { #alternatives }

    } catch (e: IOException) {
      // If we used the ProxySelector, and got a IOException during connect, report the failure.
      if (route.address.proxy == null && route.proxy.type() != Proxy.Type.DIRECT) {
        route.address.proxySelector.connectFailed(
          route.address.url.toUri(),
          route.proxy.address(),
          e,
        )
      }