enc := jsoniter.ConfigCompatibleWithStandardLibrary.NewEncoder(buf)

	for i := range items {
		if err = enc.Encode(items[i]); err != nil {
			return err
		}
	}

	path := filepath.Join(store.directory, key.String())
	if key.Compress {
		err = os.WriteFile(path, s2.Encode(nil, buf.Bytes()), os.FileMode(0o770))
	} else {
		err = os.WriteFile(path, buf.Bytes(), os.FileMode(0o770))
	}

	buf.Reset()

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

app = FastAPI()


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


items = {
    "foo": {"name": "Foo", "price": 50.2},
    "bar": {"name": "Bar", "description": "The bartenders", "price": 62, "tax": 20.2},

            for (final LockingAndXRange lockingAndXRange : this.unlocks) {
                dstIndex += lockingAndXRange.encode(dst, dstIndex);
            }
        }
        if (this.locks != null) {
            for (final LockingAndXRange lockingAndXRange : this.locks) {
                dstIndex += lockingAndXRange.encode(dst, dstIndex);
            }
        }
        return start - dstIndex;
    }

    /**

    /**
     * Gets the total length of this message.
     *
     * @return the length
     */
    public final int getLength() {
        return this.length;
    }

    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = this.headerStart = dstIndex;
        dstIndex += writeHeaderWireFormat(dst, dstIndex);

        this.byteCount = writeBytesWireFormat(dst, dstIndex);

 * mind that when dealing with char sequences, the encoded form of two concatenated char sequences
 * is not equivalent to the concatenation of their encoded form. Therefore, {@link
 * #putString(CharSequence, Charset)} should only be used consistently with <i>complete</i>
 * sequences and not broken into chunks.
 *
 * @author Kevin Bourrillion
 * @since 11.0
 */

Si vous ne déclarez pas de modèle de réponse, FastAPI utilise le `jsonable_encoder` expliqué dans [Encodeur compatible JSON](../tutorial/encoder.md) et le place dans une `JSONResponse`.

Vous pouvez également créer directement une `JSONResponse` et la renvoyer.

/// tip | Astuce

from fastapi.encoders import jsonable_encoder
from fastapi.exceptions import RequestValidationError, WebSocketRequestValidationError
from fastapi.utils import is_body_allowed_for_status_code
from fastapi.websockets import WebSocket
from starlette.exceptions import HTTPException
from starlette.requests import Request
from starlette.responses import JSONResponse, Response
from starlette.status import WS_1008_POLICY_VIOLATION

				return
			}
		}
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z *RTimedMetrics) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 4
	// write "LastHour"
	err = en.Append(0x84, 0xa8, 0x4c, 0x61, 0x73, 0x74, 0x48, 0x6f, 0x75, 0x72)
	if err != nil {
		return
	}
	err = z.LastHour.EncodeMsg(en)
	if err != nil {
		err = msgp.WrapError(err, "LastHour")
		return

	return d, nil
}

// configReader returns a PutObjReader and ObjectOptions needed to save config
// using a PutObject API. PutObjReader encrypts json encoded tier configurations
// if KMS is enabled, otherwise simply yields the json encoded bytes as is.
// Similarly, ObjectOptions value depends on KMS' status.
func (config *TierConfigMgr) configReader(ctx context.Context) (*PutObjReader, *ObjectOptions, error) {

				return
			}
		}
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z *BatchJobExpireFilter) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 8
	// write "OlderThan"
	err = en.Append(0x88, 0xa9, 0x4f, 0x6c, 0x64, 0x65, 0x72, 0x54, 0x68, 0x61, 0x6e)
	if err != nil {
		return
	}
	err = z.OlderThan.EncodeMsg(en)
	if err != nil {
		err = msgp.WrapError(err, "OlderThan")