// The unified export format starts with a 'u'; the indexed export
		// format starts with an 'i'; and the older binary export format
		// starts with a 'c', 'd', or 'v' (from "version"). Select
		// appropriate importer.
		switch exportFormat {
		case 'u':
			var data []byte
			var r io.Reader = buf
			if size >= 0 {
				if data, err = saferio.ReadData(r, uint64(size)); err != nil {
					return
				}

package org.gradle.architecture.test;

import com.google.common.collect.ImmutableList;
import com.tngtech.archunit.core.domain.JavaClass;
import com.tngtech.archunit.core.domain.JavaMethod;
import com.tngtech.archunit.core.importer.ClassFileImporter;
import com.tngtech.archunit.lang.ArchCondition;
import com.tngtech.archunit.lang.ConditionEvent;
import com.tngtech.archunit.lang.ConditionEvents;
import org.gradle.api.NonNullApi;

## Importez le `BaseModel` de Pydantic

Commencez par importer la classe `BaseModel` du module `pydantic` :

```Python hl_lines="4"
{!../../../docs_src/body/tutorial001.py!}
```

## Créez votre modèle de données

    "use-external-constant",
    llvm::cl::desc("Use external constant during flatbuffer import"),
    llvm::cl::location(use_external_constant), llvm::cl::init(false));

// TODO(b/147111261): After the importer supports generic custom ops, we should
// change the flag to a more lightwise flag, e.g.
// "import_custom_ops_as_side_effect_free_ops", and let the MLIR DCE to prune
// the operations.
// NOLINTNEXTLINE

    GraphImportConfig::InputArrays* inputs) {
  std::vector<std::string> used_node_dtypes;
  if (node_dtypes.empty()) {
    // Mark all the node dtypes Invalid, so the importer can handle them by
    // using the type from the graph.
    used_node_dtypes.resize(node_names.size(), DataType_Name(DT_INVALID));
  } else if (node_names.size() == node_dtypes.size()) {

    // TFLite flatbuffer schema doesn't distinguish scalar tensor shapes
    // and unranked tensor shapes (i.e. they are both represented as an empty
    // INT32 list), see b/138865275. MLIR importer conservatively treats them as
    // unranked tensor types. Here we set them to scalar tensor types when it is
    // safe.
    if (auto tensor_array_v3_op = dyn_cast<TF::TensorArrayV3Op>(tf_op)) {

	mime, net/textproto, net/url
	< NET;

	# logging - most packages should not import; http and up is allowed
	FMT, log/internal
	< log;

	log, log/slog !< crypto/tls, database/sql, go/importer, testing;

	FMT, log, net
	< log/syslog;

	RUNTIME
	< log/slog/internal, log/slog/internal/buffer;

	FMT,
	encoding, encoding/json,
	log, log/internal,

	"strings"
)

// The Universe scope contains all predeclared objects of Go.
// It is the outermost scope of any chain of nested scopes.
var Universe *Scope

// The Unsafe package is the package returned by an importer
// for the import path "unsafe".
var Unsafe *Package

var (
	universeIota       Object
	universeByte       Type // uint8 alias, but has name "byte"
	universeRune       Type // int32 alias, but has name "rune"

	"strings"
)

// The Universe scope contains all predeclared objects of Go.
// It is the outermost scope of any chain of nested scopes.
var Universe *Scope

// The Unsafe package is the package returned by an importer
// for the import path "unsafe".
var Unsafe *Package

var (
	universeIota       Object
	universeByte       Type // uint8 alias, but has name "byte"
	universeRune       Type // int32 alias, but has name "rune"

pkg encoding/hex, func AppendEncode([]uint8, []uint8) []uint8 #53693
pkg go/ast, func NewPackage //deprecated #52463
pkg go/ast, func Unparen(Expr) Expr #60061
pkg go/ast, type Importer //deprecated #52463
pkg go/ast, type Object //deprecated #52463
pkg go/ast, type Package //deprecated #52463
pkg go/ast, type Scope //deprecated #52463
pkg go/types, func NewAlias(*TypeName, Type) *Alias #63223