# Generating SDKs { #generating-sdks }

Because **FastAPI** is based on the **OpenAPI** specification, its APIs can be described in a standard format that many tools understand.

This makes it easy to generate up-to-date **documentation**, client libraries (<abbr title="Software Development Kits">**SDKs**</abbr>) in multiple languages, and **testing** or **automation workflows** that stay in sync with your code.

 * certificate authorities. It also prevents connections through man-in-the-middle certificate
 * authorities either known or unknown to the application's user.
 * This class currently pins a certificate's Subject Public Key Info as described on
 * [Adam Langley's Weblog][langley]. Pins are either base64 SHA-256 hashes as in
 * [HTTP Public Key Pinning (HPKP)][rfc_7469] or SHA-1 base64 hashes as in Chromium's
 * [static certificates][static_certificates].
 *

     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Application startup complete.
```

</div>

Es **ALTAMENTE recomendable** que escribas o copies el código, lo edites y lo ejecutes localmente.

Usarlo en tu editor es lo que realmente te muestra los beneficios de FastAPI, al ver cuán poco código tienes que escribir, todos los chequeos de tipos, autocompletado, etc.

     * Future was cancelled, its listeners have been run, so its consumers will not hang.
     *
     * Contrast this to the situation we have if setResult() throws, a situation described below.
     */
    I sourceResult;
    try {
      sourceResult = getDone(localInputFuture);
    } catch (CancellationException e) {

### Container Images

All container images are available as manifest lists and support the described
architectures. It is also possible to pull a specific architecture directly by
adding the "-$ARCH" suffix  to the container image name.

name | architectures
---- | -------------

	}
	type _C_mpz_t [1]_C___mpz_struct

and then replaces each occurrence of a type C.xxx with _C_xxx.

If xxx is data, cgo arranges for C.xxx to refer to the C variable,
with the type translated as described above.  To do this, cgo must
introduce a Go variable that points at the C variable (the linker can
be told to initialize this pointer).  For example, if the gmp library
provided

	mpz_t zero;

     */
    List<Method> get(String key) {
        return methodByNameMap.get(key);
    }

    /**
     * Find a method.  Attempts to find the
     * most specific applicable method using the
     * algorithm described in the JLS section
     * 15.12.2 (with the exception that it can't
     * distinguish a primitive type argument from
     * an object type argument, since in reflection
     * primitive type arguments are represented by

## Eventos Alternativos (obsoleto) { #alternative-events-deprecated }

/// warning | Advertencia

La forma recomendada de manejar el *startup* y el *shutdown* es usando el parámetro `lifespan` de la app de `FastAPI` como se describió arriba. Si proporcionas un parámetro `lifespan`, los manejadores de eventos `startup` y `shutdown` ya no serán llamados. Es solo `lifespan` o solo los eventos, no ambos.

Probablemente puedas saltarte esta parte.

///

Si necesitas un repaso de 2 minutos sobre cómo usar tipos en Python (aunque no uses FastAPI), revisa el tutorial corto: [Tipos en Python](python-types.md){.internal-link target=_blank}.

Escribes Python estándar con tipos:

```Python
from datetime import date

from pydantic import BaseModel

# Declara una variable como un str
# y obtiene soporte del editor dentro de la función
def main(user_id: str):

            writer.accept(CLIReportingUtils.showVersion(
                    ProcessHandle.current().info().commandLine().orElse(null), describe(context.terminal)));

        } else {
            writer.accept(CLIReportingUtils.showVersion());
        }
    }

    protected String describe(Terminal terminal) {
        if (terminal == null) {
            return null;
        }