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Salida de JSON de generación controlada con enum

Genera un objeto con formato JSON con un valor de enumeración, según una descripción del objeto y una lista de valores para elegir.

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Para obtener documentación en la que se incluye esta muestra de código, consulta lo siguiente:

Generación controlada

Muestra de código

C#

Antes de probar este ejemplo, sigue las instrucciones de configuración para C# incluidas en la guía de inicio rápido de Vertex AI sobre cómo usar bibliotecas cliente. Para obtener más información, consulta la documentación de referencia de la API de Vertex AI C#.

Para autenticarte en Vertex AI, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

public async Task<string> GenerateContentWithResponseSchema4(
    string projectId = "your-project-id",
    string location = "us-central1",
    string publisher = "google",
    string model = "gemini-1.5-pro-001")
{

    var predictionServiceClient = new PredictionServiceClientBuilder
    {
        Endpoint = $"{location}-aiplatform.googleapis.com"
    }.Build();

    var responseSchema = new OpenApiSchema
    {
        Type = Type.Array,
        Items = new()
        {
            Type = Type.Object,
            Properties =
            {
                ["to_discard"] = new() { Type = Type.Integer },
                ["subcategory"] = new() { Type = Type.String },
                ["safe_handling"] = new() { Type = Type.Integer },
                ["item_category"] = new()
                {
                    Type = Type.String,
                    Enum =
                    {
                        "clothing",
                        "winter apparel",
                        "specialized apparel",
                        "furniture",
                        "decor",
                        "tableware",
                        "cookware",
                        "toys"
                    }
                },
                ["for_resale"] = new() { Type = Type.Integer },
                ["condition"] = new()
                {
                    Type = Type.String,
                    Enum =
                    {
                        "new in package",
                        "like new",
                        "gently used",
                        "used",
                        "damaged",
                        "soiled"
                    }
                }
            }
        }
    };

    string prompt = @"
        Item description:
        The item is a long winter coat that has many tears all around the seams and is falling apart.
        It has large questionable stains on it.";

    var generateContentRequest = new GenerateContentRequest
    {
        Model = $"projects/{projectId}/locations/{location}/publishers/{publisher}/models/{model}",
        Contents =
        {
            new Content
            {
                Role = "USER",
                Parts =
                {
                    new Part { Text = prompt }
                }
            }
        },
        GenerationConfig = new GenerationConfig
        {
            ResponseMimeType = "application/json",
            ResponseSchema = responseSchema
        },
    };

    GenerateContentResponse response = await predictionServiceClient.GenerateContentAsync(generateContentRequest);

    string responseText = response.Candidates[0].Content.Parts[0].Text;
    Console.WriteLine(responseText);

    return responseText;
}

Go

Antes de probar este ejemplo, sigue las instrucciones de configuración para Go incluidas en la guía de inicio rápido de Vertex AI sobre cómo usar bibliotecas cliente. Para obtener más información, consulta la documentación de referencia de la API de Vertex AI Go.

import (
	"context"
	"errors"
	"fmt"
	"io"

	"cloud.google.com/go/vertexai/genai"
)

// controlledGenerationResponseSchema4 shows how to make sure the generated output
// will always be valid JSON and adhere to a specific schema.
func controlledGenerationResponseSchema4(w io.Writer, projectID, location, modelName string) error {
	// location := "us-central1"
	// modelName := "gemini-1.5-pro-001"
	ctx := context.Background()
	client, err := genai.NewClient(ctx, projectID, location)
	if err != nil {
		return fmt.Errorf("unable to create client: %w", err)
	}
	defer client.Close()

	model := client.GenerativeModel(modelName)

	model.GenerationConfig.ResponseMIMEType = "application/json"

	// Build an OpenAPI schema, in memory
	model.GenerationConfig.ResponseSchema = &genai.Schema{
		Type: genai.TypeArray,
		Items: &genai.Schema{
			Type: genai.TypeObject,
			Properties: map[string]*genai.Schema{
				"to_discard":    {Type: genai.TypeInteger},
				"subcategory":   {Type: genai.TypeString},
				"safe_handling": {Type: genai.TypeString},
				"item_category": {
					Type: genai.TypeString,
					Enum: []string{
						"clothing",
						"winter apparel",
						"specialized apparel",
						"furniture",
						"decor",
						"tableware",
						"cookware",
						"toys",
					},
				},
				"for_resale": {Type: genai.TypeInteger},
				"condition": {
					Type: genai.TypeString,
					Enum: []string{
						"new in package",
						"like new",
						"gently used",
						"used",
						"damaged",
						"soiled",
					},
				},
			},
		},
	}

	prompt := `
		Item description:
		The item is a long winter coat that has many tears all around the seams and is falling apart.
		It has large questionable stains on it.
	`

	res, err := model.GenerateContent(ctx, genai.Text(prompt))
	if err != nil {
		return fmt.Errorf("unable to generate contents: %v", err)
	}

	if len(res.Candidates) == 0 ||
		len(res.Candidates[0].Content.Parts) == 0 {
		return errors.New("empty response from model")
	}

	fmt.Fprint(w, res.Candidates[0].Content.Parts[0])
	return nil
}

Java

Antes de probar este ejemplo, sigue las instrucciones de configuración para Java incluidas en la guía de inicio rápido de Vertex AI sobre cómo usar bibliotecas cliente. Para obtener más información, consulta la documentación de referencia de la API de Vertex AI Java.

import com.google.cloud.vertexai.VertexAI;
import com.google.cloud.vertexai.api.GenerateContentResponse;
import com.google.cloud.vertexai.api.GenerationConfig;
import com.google.cloud.vertexai.api.Schema;
import com.google.cloud.vertexai.api.Type;
import com.google.cloud.vertexai.generativeai.GenerativeModel;
import com.google.cloud.vertexai.generativeai.ResponseHandler;
import java.io.IOException;
import java.util.Arrays;

public class ControlledGenerationSchema4 {
  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "genai-java-demos";
    String location = "us-central1";
    String modelName = "gemini-1.5-pro-001";

    controlGenerationWithJsonSchema4(projectId, location, modelName);
  }

  // Generate responses that are always valid JSON and comply with a JSON schema
  public static String controlGenerationWithJsonSchema4(
      String projectId, String location, String modelName)
      throws IOException {
    // Initialize client that will be used to send requests. This client only needs
    // to be created once, and can be reused for multiple requests.
    try (VertexAI vertexAI = new VertexAI(projectId, location)) {
      Schema itemSchema = Schema.newBuilder()
          .setType(Type.OBJECT)
          .putProperties("to_discard", Schema.newBuilder().setType(Type.INTEGER).build())
          .putProperties("subcategory", Schema.newBuilder().setType(Type.STRING).build())
          .putProperties("safe_handling", Schema.newBuilder().setType(Type.INTEGER).build())
          .putProperties("item_category", Schema.newBuilder()
              .setType(Type.STRING)
              .addAllEnum(Arrays.asList(
                  "clothing", "winter apparel", "specialized apparel", "furniture",
                  "decor", "tableware", "cookware", "toys"))
              .build())
          .putProperties("for_resale", Schema.newBuilder().setType(Type.INTEGER).build())
          .putProperties("condition", Schema.newBuilder()
              .setType(Type.STRING)
              .addAllEnum(Arrays.asList(
                  "new in package", "like new", "gently used", "used", "damaged", "soiled"))
              .build())
          .build();

      GenerationConfig generationConfig = GenerationConfig.newBuilder()
          .setResponseMimeType("application/json")
          .setResponseSchema(Schema.newBuilder()
              .setType(Type.ARRAY)
              .setItems(itemSchema)
              .build())
          .build();

      GenerativeModel model = new GenerativeModel(modelName, vertexAI)
          .withGenerationConfig(generationConfig);

      GenerateContentResponse response = model.generateContent(
          "Item description:\n"
              + "The item is a long winter coat that has many tears all around the seams "
              + "and is falling apart.\n"
              + "It has large questionable stains on it."
      );

      String output = ResponseHandler.getText(response);
      System.out.println(output);
      return output;
    }
  }
}

Python

Antes de probar este ejemplo, sigue las instrucciones de configuración para Python incluidas en la guía de inicio rápido de Vertex AI sobre cómo usar bibliotecas cliente. Para obtener más información, consulta la documentación de referencia de la API de Vertex AI Python.

import vertexai

from vertexai.generative_models import GenerationConfig, GenerativeModel

# TODO(developer): Update and un-comment below line
# PROJECT_ID = "your-project-id"
vertexai.init(project=PROJECT_ID, location="us-central1")

response_schema = {
    "type": "ARRAY",
    "items": {
        "type": "OBJECT",
        "properties": {
            "to_discard": {"type": "INTEGER"},
            "subcategory": {"type": "STRING"},
            "safe_handling": {"type": "INTEGER"},
            "item_category": {
                "type": "STRING",
                "enum": [
                    "clothing",
                    "winter apparel",
                    "specialized apparel",
                    "furniture",
                    "decor",
                    "tableware",
                    "cookware",
                    "toys",
                ],
            },
            "for_resale": {"type": "INTEGER"},
            "condition": {
                "type": "STRING",
                "enum": [
                    "new in package",
                    "like new",
                    "gently used",
                    "used",
                    "damaged",
                    "soiled",
                ],
            },
        },
    },
}

prompt = """
    Item description:
    The item is a long winter coat that has many tears all around the seams and is falling apart.
    It has large questionable stains on it.
"""

model = GenerativeModel("gemini-1.5-pro-002")

response = model.generate_content(
    prompt,
    generation_config=GenerationConfig(
        response_mime_type="application/json", response_schema=response_schema
    ),
)

print(response.text)
# Example response:
# [
#     {
#         "condition": "damaged",
#         "item_category": "clothing",
#         "subcategory": "winter apparel",
#         "to_discard": 123,
#     }
# ]

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