### Dependency Injection { #dependency-injection }

FastAPI includes an extremely easy to use, but extremely powerful <abbr title='also known as "components", "resources", "services", "providers"'><strong>Dependency Injection</strong></abbr> system.

* Even dependencies can have dependencies, creating a hierarchy or **"graph" of dependencies**.
* All **automatically handled** by the framework.

### Dependency injection

FastAPI'ın inanılmaz derecede kullanımı kolay, fakat inanılmaz derecede güçlü <abbr title='"components", "resources", "services", "providers" olarak da bilinen'><strong>Dependency Injection </strong></abbr> sistemi var.

* Dependencylerin bile dependencies'i olabiliyor, FastAPI bunun  için **graph of "dependency"** yaratıyor.

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild.cleanup.services

import spock.lang.Specification

class LeakingProcessKillPatternTest extends Specification {

    def "matches worker process started in test on Windows"() {

## Default response class { #default-response-class }

When creating a **FastAPI** class instance or an `APIRouter` you can specify which response class to use by default.

The parameter that defines this is `default_response_class`.

In the example below, **FastAPI** will use `ORJSONResponse` by default, in all *path operations*, instead of `JSONResponse`.

{* ../../docs_src/custom_response/tutorial010_py39.py hl[2,4] *}

### Внедрение зависимостей { #dependency-injection }

FastAPI включает в себя чрезвычайно простую в использовании, но чрезвычайно мощную систему <abbr title='известную как: "components", "resources", "services", "providers"'><strong>Внедрения зависимостей</strong></abbr>.

* Даже зависимости могут иметь зависимости, создавая иерархию или **«граф» зависимостей**.
* Всё **автоматически обрабатывается** фреймворком.

Luego, cuando es tu turno, haces un trabajo realmente "productivo", procesas el menú, decides lo que quieres, obtienes la elección de tu crush, pagas, verificas que das el billete o tarjeta correctos, verificas que te cobren correctamente, verificas que el pedido tenga los artículos correctos, etc.

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.cling.transfer;

import java.util.Locale;
import java.util.stream.Stream;

import org.apache.maven.api.services.MessageBuilder;
import org.apache.maven.cling.transfer.FileSizeFormat.ScaleUnit;
import org.apache.maven.impl.DefaultMessageBuilder;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;

### Injeção de dependência { #dependency-injection }

FastAPI inclui um sistema de <abbr title='também conhecido como "components", "resources", "services", "providers"'><strong>injeção de dependência</strong></abbr> extremamente fácil de usar, mas extremamente poderoso.

* Mesmo dependências podem ter dependências, criando uma hierarquia ou **"grafo" de dependências**.

   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    * Porque las estructuras de datos de pydantic son solo instances de clases que defines; autocompletado, linting, mypy y tu intuición deberían funcionar correctamente con tus datos validados.
* Valida **estructuras complejas**:
    * Uso de modelos jerárquicos de Pydantic, `List` y `Dict` de `typing` de Python, etc.