```txt
Hello, World from Flask!
```

And if you go to <a href="http://localhost:8000/v2" class="external-link" target="_blank">http://localhost:8000/v2</a> you will see the response from FastAPI:

```JSON
{
    "message": "Hello World"
}

        ("inf", 422),
        ("-inf", 422),
        ("nan", 422),
        ("0", 200),
        ("342", 200),
    ],
)
def test_allow_inf_nan_body(value: str, code: int):
    response = client.post("/", json=value)

        return "https://golang.org/change/" + match[1];
    }

    if (pkgRE.test(t)) {
        // TODO: make this smarter, using a list of packages + substring matches.
        // Get the list from godoc itself in JSON format?
        return "https://golang.org/pkg/" + t;
    }

    return null;

Вы можете использовать функцию `jsonable_encoder` для преобразования входных данных в JSON, так как нередки случаи, когда работать можно только с простыми типами данных (например, для хранения в NoSQL-базе данных).

//// tab | Python 3.10+

```Python hl_lines="28-33"

Example resource specifications include:
   '-f rsrc.yaml'
   '--filename=rsrc.json'`)

	validFields = map[string]struct{}{
		"apiVersion": {},
		"kind":       {},
		"metadata":   {},
		"spec":       {},
		"status":     {},
	}

	serviceProtocolUDP = "UDP"

	fileExtensions = []string{".json", ".yaml", ".yml"}
)

type validator struct{}

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

package nodeagent

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net"
	"net/http"
	"net/netip"
	"time"

	corev1 "k8s.io/api/core/v1"

	pconstants "istio.io/istio/cni/pkg/constants"
	"istio.io/istio/cni/pkg/pluginlistener"

// 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 configdump

import (
	"encoding/json"
	"fmt"
	"sort"
	"strconv"
	"strings"
	"text/tabwriter"

	core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
	route "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"

## OpenAPI URL

By default, the OpenAPI schema is served at `/openapi.json`.

But you can configure it with the parameter `openapi_url`.

For example, to set it to be served at `/api/v1/openapi.json`:

```Python hl_lines="3"
{!../../docs_src/metadata/tutorial002.py!}
```

    * <a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**Et bien d'autres fonctionnalités**</a> comme la validation automatique, la sérialisation, l'authentification...

import (
	"encoding/xml"
	"time"
)

var (
	errLifecycleInvalidDate         = Errorf("Date must be provided in ISO 8601 format")
	errLifecycleInvalidDays         = Errorf("Days must be positive integer when used with Expiration")
	errLifecycleInvalidExpiration   = Errorf("Exactly one of Days (positive integer) or Date (positive ISO 8601 format) should be present inside Expiration.")