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

This is still supported thanks to **Pydantic**, as it has <a href="https://docs.pydantic.dev/latest/concepts/dataclasses/#use-of-stdlib-dataclasses-with-basemodel" class="external-link" target="_blank">internal support for `dataclasses`</a>.

# CORS (Обмін ресурсами між різними джерелами)

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">CORS або "Обмін ресурсами між різними джерелами"</a> є ситуація, коли фронтенд, що працює в браузері, містить JavaScript-код, який взаємодіє з бекендом, розташованим в іншому "джерелі" (origin).

## Джерело (Origin)

## Технические детали { #technical-details }

Класс `BackgroundTasks` приходит напрямую из <a href="https://www.starlette.dev/background/" class="external-link" target="_blank">`starlette.background`</a>.

{* ../../docs_src/middleware/tutorial001_py39.py hl[8:9,11,14] *}

/// tip | Dica

Tenha em mente que cabeçalhos proprietários personalizados podem ser adicionados <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">usando o prefixo `X-`</a>.

import com.google.common.collect.ImmutableList;
import com.google.gson.annotations.SerializedName;
import japicmp.model.JApiMethod;

import java.util.List;
import java.util.Objects;

public class UpgradedProperty {
    private final String containingType;
    private final String propertyName;
    private final String methodName;
    private final String methodDescriptor;

    /**

import org.junit.jupiter.api.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import jcifs.dcerpc.DcerpcConstants;

/**
 * Tests for {@link MsrpcSamrConnect4}.
 */
class MsrpcSamrConnect4Test implements DcerpcConstants {

    @Mock
    private SamrPolicyHandle policyHandle;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
    }

    /**

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.publicsuffix

import org.junit.runner.Runner

expect class PublicSuffixTestRunner : Runner

from typing import Union

from fastapi import FastAPI
from fastapi.encoders import jsonable_encoder
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: Union[str, None] = None
    description: Union[str, None] = None
    price: Union[float, None] = None
    tax: float = 10.5
    tags: list[str] = []


items = {
    "foo": {"name": "Foo", "price": 50.2},

from fastapi.responses import StreamingResponse
from sqlmodel import Field, Session, SQLModel, create_engine

engine = create_engine("postgresql+psycopg://postgres:postgres@localhost/db")


class User(SQLModel, table=True):
    id: int | None = Field(default=None, primary_key=True)
    name: str


app = FastAPI()


def get_session():
    with Session(engine) as session:
        yield session

import org.apache.commons.logging.LogFactory;

/**
 * Factory for creating adapters that use (Jakarta) Commons Logging loggers.
 *
 * @author koichik
 */
class JclLoggerAdapterFactory implements LoggerAdapterFactory {

    @Override
    public LoggerAdapter getLoggerAdapter(final Class<?> clazz) {
        return new JclLoggerAdapter(clazz);
    }

    @Override
    public void releaseAll() {
        LogFactory.releaseAll();
    }