Hablaremos mucho sobre el "**proceso**" en ejecución, así que es útil tener claridad sobre lo que significa y cuál es la diferencia con la palabra "**programa**".

### Qué es un Programa { #what-is-a-program }

La palabra **programa** se usa comúnmente para describir muchas cosas:

* El **código** que escribes, los **archivos Python**.

    // call get() twice to make sure that memoization doesn't interfere
    // with throwing the exception
    for (int i = 0; i < 2; i++) {
      try {
        memoizedSupplier.get();
        fail("failed to throw NullPointerException");
      } catch (NullPointerException e) {
        // this is what should happen
      }
    }
  }

  @J2ktIncompatible

    // call get() twice to make sure that memoization doesn't interfere
    // with throwing the exception
    for (int i = 0; i < 2; i++) {
      try {
        memoizedSupplier.get();
        fail("failed to throw NullPointerException");
      } catch (NullPointerException e) {
        // this is what should happen
      }
    }
  }

  @J2ktIncompatible

 * that you implement a {@link Funnel}{@code <T>} to specify how to "feed" data from that object
 * into the function. (See {@linkplain Hasher#putObject an example} of this.)
 *
 * <p><b>Compatibility note:</b> Throughout this API, multibyte values are always interpreted in
 * <i>little-endian</i> order. That is, hashing the byte array {@code {0x01, 0x02, 0x03, 0x04}} is

      HashCode that = (HashCode) object;
      return bits() == that.bits() && equalsSameBits(that);
    }
    return false;
  }

  /**
   * Returns a "Java hash code" for this {@code HashCode} instance; this is well-defined (so, for
   * example, you can safely put {@code HashCode} instances into a {@code HashSet}) but is otherwise
   * probably not what you want to use.
   */
  @Override

 * that you implement a {@link Funnel}{@code <T>} to specify how to "feed" data from that object
 * into the function. (See {@linkplain Hasher#putObject an example} of this.)
 *
 * <p><b>Compatibility note:</b> Throughout this API, multibyte values are always interpreted in
 * <i>little-endian</i> order. That is, hashing the byte array {@code {0x01, 0x02, 0x03, 0x04}} is

   | it to several places.
   |
   | That repository definition will have a unique id, so we can create a mirror reference for that
   | repository, to be used as an alternate download site. The mirror site will be the preferred
   | server for that repository.
   |-->
  <mirrors>
    <!-- mirror
     | Specifies a repository mirror site to use instead of a given repository. The repository that

   * that use {@code comparator} to determine the least and greatest elements.
   */
  /*
   * TODO(cpovirk): Change to Comparator<? super B> to permit Comparator<@Nullable ...> and
   * Comparator<SupertypeOfB>? What we have here matches the immutable collections, but those also
   * expose a public Builder constructor that accepts "? super." So maybe we should do *that*
   * instead.
   */

Todos os utilitários de segurança que se integram com o OpenAPI (e com a documentação automática da API) herdam de `SecurityBase`, é assim que o **FastAPI** sabe como integrá-los ao OpenAPI.

///

## O que ele faz { #what-it-does }

Ele irá procurar na requisição pelo header `Authorization`, verificar se o valor é `Bearer ` mais algum token e retornará o token como uma `str`.

Todas las utilidades de seguridad que se integran con OpenAPI (y los docs automáticos del API) heredan de `SecurityBase`, así es como **FastAPI** puede saber cómo integrarlas en OpenAPI.

///

## Lo que hace { #what-it-does }

Irá y buscará en el request ese header `Authorization`, verificará si el valor es `Bearer ` más algún token, y devolverá el token como un `str`.