If you need a refresher about when to use which, check out the section _"In a hurry?"_ in the docs about [`async` and `await`](../async.md#in-a-hurry){.internal-link target=_blank}.

9. This *path operation function* is not returning dataclasses (although it could), but a list of dictionaries with internal data.

    FastAPI will use the `response_model` parameter (that includes dataclasses) to convert the response.

# Advanced Middleware { #advanced-middleware }

In the main tutorial you read how to add [Custom Middleware](../tutorial/middleware.md){.internal-link target=_blank} to your application.

And then you also read how to handle [CORS with the `CORSMiddleware`](../tutorial/cors.md){.internal-link target=_blank}.

In this section we'll see how to use other middlewares.

## Adding ASGI middlewares { #adding-asgi-middlewares }

Die Hauptaufgaben, die Sie jetzt erledigen können, sind:

* [Anderen bei Fragen auf GitHub helfen](#help-others-with-questions-in-github){.internal-link target=_blank} (siehe Abschnitt oben).
* [Pull Requests prüfen](#review-pull-requests){.internal-link target=_blank} (siehe Abschnitt oben).

Diese beiden Aufgaben sind die Dinge, die **am meisten Zeit verbrauchen**. Das ist die Hauptarbeit bei der Wartung von FastAPI.

There are some data structures that can contain other values, like `dict`, `list`, `set` and `tuple`. And the internal values can have their own type too.

These types that have internal types are called "**generic**" types. And it's possible to declare them, even with their internal types.

To declare those types and the internal types, you can use the standard Python module `typing`. It exists specifically to support these type hints.

import jcifs.Configuration;
import jcifs.RuntimeCIFSException;
import jcifs.SmbTreeHandle;
import jcifs.internal.CommonServerMessageBlockRequest;
import jcifs.internal.CommonServerMessageBlockResponse;
import jcifs.internal.Request;
import jcifs.internal.SmbNegotiationResponse;
import jcifs.internal.smb1.com.SmbComNegotiateResponse;

@ExtendWith(MockitoExtension.class)
@MockitoSettings(strictness = Strictness.LENIENT)

import java.io.IOException
import java.io.InputStream
import java.io.InputStreamReader
import java.io.Reader
import java.nio.charset.Charset
import okhttp3.internal.charsetOrUtf8
import okhttp3.internal.chooseCharset
import okhttp3.internal.closeQuietly
import okhttp3.internal.readBomAsCharset
import okio.Buffer
import okio.BufferedSource
import okio.ByteString
import okio.use

/**

	"sync"
	"sync/atomic"
	"time"

	"github.com/IBM/sarama"
	saramatls "github.com/IBM/sarama/tools/tls"

	xioutil "github.com/minio/minio/internal/ioutil"
	types "github.com/minio/minio/internal/logger/target/loggertypes"
	"github.com/minio/minio/internal/once"
	"github.com/minio/minio/internal/store"
	xnet "github.com/minio/pkg/v3/net"
)

// the suffix for the configured queue dir where the logs will be persisted.

package json

import (
	"bufio"
	"bytes"
	"io"
	"runtime"
	"sync"

	"github.com/minio/minio/internal/bpool"
	"github.com/minio/minio/internal/s3select/jstream"
	"github.com/minio/minio/internal/s3select/sql"
)

// PReader - JSON record reader for S3Select.
// Operates concurrently on line-delimited JSON.
type PReader struct {
	args        *ReaderArgs

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.dcerpc.msrpc;

import java.io.IOException;

import jcifs.internal.dtyp.ACE;
import jcifs.internal.dtyp.SecurityDescriptor;

/**
 * MSRPC implementation for retrieving share information.
 * This class provides functionality to get detailed information about

 * 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.tls.internal

import java.net.InetSocketAddress
import java.net.Socket
import java.security.cert.CertificateException
import java.security.cert.X509Certificate
import javax.net.ssl.SSLEngine