That same information from the models that is included in OpenAPI is what can be used to **generate the client code**.

### Hey API { #hey-api }

Once we have a FastAPI app with the models, we can use Hey API to generate a TypeScript client. The fastest way to do that is via npx.

```sh
npx @hey-api/openapi-ts -i http://localhost:8000/openapi.json -o src/client
```

### Создание `Settings` только один раз с помощью `lru_cache` { #creating-the-settings-only-once-with-lru-cache }

Чтение файла с диска обычно затратная (медленная) операция, поэтому, вероятно, вы захотите сделать это один раз и затем переиспользовать один и тот же объект настроек, а не читать файл при каждом запросе.

	// 'in' and 'out' are independent.
	// The handler should never close out.
	// Buffers received from 'in'  can be recycled with PutByteBuffer.
	// Buffers sent on out can not be referenced once sent.
	StreamHandlerFn func(ctx context.Context, payload []byte, in <-chan []byte, out chan<- []byte) *RemoteErr

	// StreamHandler handles fully bidirectional streams,
	// There is flow control in both directions.

                    {"data": "examples example_examples 2"},
                ],
            ),
        ):
            return item

    # TODO: enable these tests once/if Form(embed=False) is supported
    # TODO: In that case, define if File() should support example/examples too
    # @app.post("/form_example")
    # def form_example(firstname: str = Form(example="John")):

	}
	// A UID is added for every resource
	if len(l.lockUID) != len(rResources)*2+len(wResources)*m {
		t.Fatalf("lockUID len, got %d, want %d + %d", len(l.lockUID), len(rResources)*2, len(wResources)*m)
	}
	// RUnlock once...
	for i, name := range rResources {
		arg := dsync.LockArgs{
			UID:       rUIDs[i*2],
			Resources: []string{name},
			Source:    t.Name(),
			Owner:     "owner",
			Quorum:    &quorum,
		}

abstract class ExternalModulesExtension(bundleGroovyMajor: Int) {

    val groovyVersion = when (bundleGroovyMajor) {
        4 -> "4.0.29"
        // This is expected to contain Groovy 5 soon, once it's released or we need to test it.
        else -> error("Unsupported Groovy major version: $bundleGroovyMajor")
    }

    val configurationCacheReportVersion = "1.30"
    val gradleIdeStarterVersion = "0.8.2"

### Die `Settings` nur einmal laden mittels `lru_cache` { #creating-the-settings-only-once-with-lru-cache }

	// Is MINIO_SYNC_BOOT set?
	globalEnableSyncBoot bool

	// Contains NIC interface name used for internode communication
	globalInternodeInterface     string
	globalInternodeInterfaceOnce sync.Once

	// Set last client perf extra time (get lock, and validate)
	globalLastClientPerfExtraTime int64

	// Captures all batch jobs metrics globally
	globalBatchJobsMetrics batchJobMetrics

Aqui definimos a configuração `env_file` dentro da sua classe `Settings` do Pydantic e definimos o valor como o nome do arquivo dotenv que queremos usar.

### Criando o `Settings` apenas uma vez com `lru_cache` { #creating-the-settings-only-once-with-lru-cache }

Ler um arquivo do disco normalmente é uma operação custosa (lenta), então você provavelmente vai querer fazer isso apenas uma vez e depois reutilizar o mesmo objeto de configurações, em vez de lê-lo a cada requisição.

### Creando el `Settings` solo una vez con `lru_cache` { #creating-the-settings-only-once-with-lru-cache }