و زیر برنامه ها نیز می تواند زیر برنامه های متصل شده خود را داشته باشد و همه چیز به درستی کار کند، زیرا FastAPI تمام این مسیرهای `root_path` را به طور خودکار مدیریت می کند.

 * limitations under the License.
 */

package gradlebuild.binarycompatibility

import org.gradle.testkit.runner.GradleRunner
import org.gradle.testkit.runner.TaskOutcome
import org.gradle.util.internal.TextUtil
import org.junit.jupiter.api.Assertions
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.io.TempDir
import java.io.File
import java.io.StringWriter

import okhttp3.ExperimentalOkHttpApi
import okhttp3.Handshake
import okhttp3.Handshake.Companion.handshake
import okhttp3.Headers
import okhttp3.HttpUrl
import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
import okhttp3.internal.platform.Platform
import okio.Buffer

/** An HTTP request that came into the mock web server. */
@ExperimentalOkHttpApi
class RecordedRequest(
  val requestLine: String,
  /** All headers. */

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

import java.net.InetSocketAddress
import java.net.Proxy
import okhttp3.internal.toCanonicalHost

/**
 * The concrete route used by a connection to reach an abstract origin server. When creating a
 * connection the client has many options:
 *

 * 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 okhttp3.internal.http

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import java.util.Date
import java.util.TimeZone
import org.junit.jupiter.api.AfterEach

```Python hl_lines="21  26"
{!../../docs_src/metadata/tutorial004.py!}
```

/// info | "Дополнительная информация"

Узнайте больше о тегах в [Конфигурации операции пути](path-operation-configuration.md#_3){.internal-link target=_blank}.

///

### Проверьте документацию

Теперь, если вы проверите документацию, вы увидите всю дополнительную информацию:

<img src="/img/tutorial/metadata/image02.png">

---

## Install FastAPI

The first step is to install FastAPI.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then **install FastAPI**:

<div class="termy">

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

---> 100%
```

</div>

/// note

Pour voir un exemple, allez voir les [Générateurs de projets](../project-generation.md){.internal-link target=_blank}, ils incluent tous Celery déjà configuré.

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.repository.internal;

import java.util.Arrays;
import java.util.List;

import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.collection.CollectRequest;

也可以使用 `from starlette import status`。

为了让开发者更方便，**FastAPI** 提供了与 `starlette.status` 完全相同的 `fastapi.status`。但它直接来自于 Starlette。

///

## 更改默认状态码