{* ../../docs_src/python_types/tutorial001_py310.py hl[2] *}

### Edit it { #edit-it }

It's a very simple program.

But now imagine that you were writing it from scratch.

At some point you would have started the definition of the function, you had the parameters ready...

But then you have to call "that method that converts the first letter to upper case".

Was it `upper`? Was it `uppercase`? `first_uppercase`? `capitalize`?

    // tells the main thread when computation is pending
    CountDownLatch secondSignal = new CountDownLatch(1);
    // tells the main thread when the second get has started
    CountDownLatch thirdSignal = new CountDownLatch(1);
    // tells the main thread when the third get has started
    CountDownLatch fourthSignal = new CountDownLatch(1);
    // tells the test when all gets have returned

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

Esto generará un SDK de TypeScript en `./src/client`.

Puedes aprender cómo [instalar `@hey-api/openapi-ts`](https://heyapi.dev/openapi-ts/get-started) y leer sobre el [output generado](https://heyapi.dev/openapi-ts/output) en su sitio web.

### Usar el SDK { #using-the-sdk }

- **Network & I/O** (`org.codelibs.core.net`, `org.codelibs.core.nio`) - URL utilities, UUID generation, MIME type detection, and NIO channel operations

## 🚀 Getting Started

### Requirements
- **Java 21 or higher** (Required for modern language features)
- **Maven 3.6+** or **Gradle 7+** for build management
- **Optional**: SLF4J or Commons Logging for logging support

```

Dies generiert ein TypeScript-SDK in `./src/client`.

Sie können lernen, wie man [`@hey-api/openapi-ts` installiert](https://heyapi.dev/openapi-ts/get-started) und über die [erzeugte Ausgabe](https://heyapi.dev/openapi-ts/output) auf deren Website lesen.

### Das SDK verwenden { #using-the-sdk }

INFO:     Will watch for changes in these directories: ['/home/user/code/awesomeapp']
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [2248755] using WatchFiles
INFO:     Started server process [2248757]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">

INFO:     Will watch for changes in these directories: ['/home/user/code/awesomeapp']
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [2248755] using WatchFiles
INFO:     Started server process [2248757]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">

    val a3 = client.newCall(newRequest("http://a/3"))
    val a4 = client.newCall(newRequest("http://a/4"))
    val t1 = makeSynchronousCall(a1)
    val t2 = makeSynchronousCall(a2)

    // We created 4 calls and started 2 of them. That's 2 running calls and 0 queued.
    ready.await()
    assertThat(dispatcher.runningCallsCount()).isEqualTo(2)
    assertThat(dispatcher.queuedCallsCount()).isEqualTo(0)

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

Isso gerará um SDK TypeScript em `./src/client`.

Você pode aprender como [instalar `@hey-api/openapi-ts`](https://heyapi.dev/openapi-ts/get-started) e ler sobre o [resultado gerado](https://heyapi.dev/openapi-ts/output) no site deles.

### Usando o SDK { #using-the-sdk }

}

// newProgressMessage - creates new Progress Message. S3 periodically sends this message, if requested.
// It contains information about the progress of a query that has started but has not yet completed.
//
// Header specification:
// Progress messages contain three headers, as follows:
// https://docs.aws.amazon.com/AmazonS3/latest/API/images/s3select-frame-diagram-progress.png
//