![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-05-swagger-04.png)

### Plus loin avec la documentation API alternative

Et maintenant, rendez-vous sur <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>.

* La documentation alternative reflétera également le nouveau paramètre de requête et le nouveau corps :

$ python main.py

Eu juro solenemente 🐺
```

</div>

## Alternativas

Este é um guia simples para você começar e lhe ensinar como tudo funciona **por baixo**.

Existem muitas **alternativas** para gerenciar ambientes virtuais, dependências de pacotes (requisitos) e projetos.

    assertThat(okHttpCertificate.tbsCertificate.validity).isEqualTo(Validity(-1000L, 2000L))
    assertThat(okHttpCertificate.tbsCertificate.serialNumber).isEqualTo(BigInteger("17"))
  }

  @Test
  fun `missing subject alternative names`() {
    val certificate =
      HeldCertificate.Builder()
        .certificateAuthority(3)
        .commonName("Jurassic Park")
        .organizationalUnit("Gene Research")

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-05-swagger-04.png)

### Alternatif API Dokümantasyonundaki Değişimi Görelim

Şimdi ise <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a> bağlantısına tekrar gidelim.

* Alternatif dokümantasyonda yaptığımız değişiklikler ile birlikte yeni sorgu parametresi ve gövde bilgisi ile güncelemiş olacak:

Sie wird direkt in FastAPI importiert/inkludiert, sodass Sie sie von `fastapi` importieren können und vermeiden, versehentlich das alternative `BackgroundTask` (ohne das `s` am Ende) von `starlette.background` zu importieren.

* Show a **clear error** for the client when the data is not valid
* **Document** the parameter in the OpenAPI schema *path operation* (so it will show up in the **automatic docs UI**)

## Alternative (old): `Query` as the default value

        Cell a = as[i];
        if (a != null) sum += a.value;
      }
    }
    return sum;
  }

  /**
   * Resets variables maintaining the sum to zero. This method may be a useful alternative to
   * creating a new adder, but is only effective if there are no concurrent updates. Because this
   * method is intrinsically racy, it should only be used when it is known that no threads are
   * concurrently updating.

        Cell a = as[i];
        if (a != null) sum += a.value;
      }
    }
    return sum;
  }

  /**
   * Resets variables maintaining the sum to zero. This method may be a useful alternative to
   * creating a new adder, but is only effective if there are no concurrent updates. Because this
   * method is intrinsically racy, it should only be used when it is known that no threads are
   * concurrently updating.

   * interned, and so does not prevent these instances from being garbage-collected. This most
   * likely does not perform as well as {@link #newStrongInterner}, but is the best alternative when
   * the memory usage of that implementation is unacceptable.
   */
  @GwtIncompatible("java.lang.ref.WeakReference")
  public static <E> Interner<E> newWeakInterner() {
    return newBuilder().weak().build();

 * might be absent" as two distinct types in your program, which can aid clarity.
 *
 * <p>Some uses of this class include
 *
 * <ul>
 *   <li>As a method return type, as an alternative to returning {@code null} to indicate that no
 *       value was available
 *   <li>To distinguish between "unknown" (for example, not present in a map) and "known to have no