預測自訂訓練模型

使用 predict 方法取得自訂訓練模型的預測結果。

深入探索

如需包含這個程式碼範例的詳細說明文件，請參閱下列內容：

• 透過自訂訓練模型取得線上推論結果

程式碼範例

Java

在試用這個範例之前，請先按照Java使用用戶端程式庫的 Vertex AI 快速入門中的操作說明進行設定。 詳情請參閱 Vertex AI Java API 參考說明文件。

如要向 Vertex AI 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

import com.google.cloud.aiplatform.v1.EndpointName;
import com.google.cloud.aiplatform.v1.PredictRequest;
import com.google.cloud.aiplatform.v1.PredictResponse;
import com.google.cloud.aiplatform.v1.PredictionServiceClient;
import com.google.cloud.aiplatform.v1.PredictionServiceSettings;
import com.google.protobuf.ListValue;
import com.google.protobuf.Value;
import com.google.protobuf.util.JsonFormat;
import java.io.IOException;
import java.util.List;

public class PredictCustomTrainedModelSample {
  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String instance = "[{ “feature_column_a”: “value”, “feature_column_b”: “value”}]";
    String project = "YOUR_PROJECT_ID";
    String endpointId = "YOUR_ENDPOINT_ID";
    predictCustomTrainedModel(project, endpointId, instance);
  }

  static void predictCustomTrainedModel(String project, String endpointId, String instance)
      throws IOException {
    PredictionServicPredictionServiceSettingsceSettings =
        PredictionServicPredictionServiceSettings          .setEndpoint("us-central1-aiplatform.googleapis.com:443")
            .build();

    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the "close" method on the client to safely clean up any remaining background resources.
    try (PredictionServicPredictionServiceClientceClient =
        PredictionServicPredictionServiceClientonServiceSettings)) {
      String location = "us-central1";
      EndpointName endEndpointNameEndpointName.of(EndpointNameation, endpointId);

      ListValue.BuildeListValueue = ListValue.newBuiListValue     JsonFormat.parseJsonFormatinstance, listValue);
      List<Value> instanListValuelistValue.getValuesList();

      PredictRequest pPredictRequest=
          PredictRequest.nPredictRequest            .setEndpoint(endpointName.toSendpointName.toString().addAllInstances(instanceList)
              .build();
      PredictResponse PredictResponse = predictionServiceClient.predict(predictRequest);

      System.out.println("Predict Custom Trained model Response");
      System.out.format("\tDeployed Model Id: %s\n", predictResponse.predictResponse.getDeployedModelId()out.println("Predictions");
      for (Value predictionValueedictResponse.predictResponse.getPredictionsList()em.out.format("\tPrediction: %s\n", prediction);
      }
    }
  }
}

Node.js

在試用這個範例之前，請先按照Node.js使用用戶端程式庫的 Vertex AI 快速入門中的操作說明進行設定。 詳情請參閱 Vertex AI Node.js API 參考說明文件。

如要向 Vertex AI 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

/**
 * TODO(developer): Uncomment these variables before running the sample.\
 * (Not necessary if passing values as arguments)
 */

// const filename = "YOUR_PREDICTION_FILE_NAME";
// const endpointId = "YOUR_ENDPOINT_ID";
// const project = 'YOUR_PROJECT_ID';
// const location = 'YOUR_PROJECT_LOCATION';
const util = require('util');
const {readFile} = require('fs');
const readFileAsync = util.promisify(readFile);

// Imports the Google Cloud Prediction Service Client library
const {PredictionServiceClient} = require('@google-cloud/aiplatform');

// Specifies the location of the api endpoint
const clientOptions = {
  apiEndpoint: 'us-central1-aiplatform.googleapis.com',
};

// Instantiates a client
const predictionServiceClient = new PredictionServiceClient(clientOptions);

async function predictCustomTrainedModel() {
  // Configure the parent resource
  const endpoint = `projects/${project}/locations/${location}/endpoints/${endpointId}`;
  const parameters = {
    structValue: {
      fields: {},
    },
  };
  const instanceDict = await readFileAsync(filename, 'utf8');
  const instanceValue = JSON.parse(instanceDict);
  const instance = {
    structValue: {
      fields: {
        Age: {stringValue: instanceValue['Age']},
        Balance: {stringValue: instanceValue['Balance']},
        Campaign: {stringValue: instanceValue['Campaign']},
        Contact: {stringValue: instanceValue['Contact']},
        Day: {stringValue: instanceValue['Day']},
        Default: {stringValue: instanceValue['Default']},
        Deposit: {stringValue: instanceValue['Deposit']},
        Duration: {stringValue: instanceValue['Duration']},
        Housing: {stringValue: instanceValue['Housing']},
        Job: {stringValue: instanceValue['Job']},
        Loan: {stringValue: instanceValue['Loan']},
        MaritalStatus: {stringValue: instanceValue['MaritalStatus']},
        Month: {stringValue: instanceValue['Month']},
        PDays: {stringValue: instanceValue['PDays']},
        POutcome: {stringValue: instanceValue['POutcome']},
        Previous: {stringValue: instanceValue['Previous']},
      },
    },
  };

  const instances = [instance];
  const request = {
    endpoint,
    instances,
    parameters,
  };

  // Predict request
  const [response] = await predictionServiceClient.predict(request);

  console.log('Predict custom trained model response');
  console.log(`\tDeployed model id : ${response.deployedModelId}`);
  const predictions = response.predictions;
  console.log('\tPredictions :');
  for (const prediction of predictions) {
    console.log(`\t\tPrediction : ${JSON.stringify(prediction)}`);
  }
}
predictCustomTrainedModel();

Python

在試用這個範例之前，請先按照Python使用用戶端程式庫的 Vertex AI 快速入門中的操作說明進行設定。 詳情請參閱 Vertex AI Python API 參考說明文件。

如要向 Vertex AI 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

from typing import Dict, List, Union

from google.cloud import aiplatform
from google.protobuf import json_format
from google.protobuf.struct_pb2 import Value


def predict_custom_trained_model_sample(
    project: str,
    endpoint_id: str,
    instances: Union[Dict, List[Dict]],
    location: str = "us-central1",
    api_endpoint: str = "us-central1-aiplatform.googleapis.com",
):
    """
    `instances` can be either single instance of type dict or a list
    of instances.
    """
    # The AI Platform services require regional API endpoints.
    client_options = {"api_endpoint": api_endpoint}
    # Initialize client that will be used to create and send requests.
    # This client only needs to be created once, and can be reused for multiple requests.
    client = aiplatform.gapic.PredictionServiceClient(client_options=client_options)
    # The format of each instance should conform to the deployed model's prediction input schema.
    instances = instances if isinstance(instances, list) else [instances]
    instances = [
        json_format.ParseDict(instance_dict, Value()) for instance_dict in instances
    ]
    parameters_dict = {}
    parameters = json_format.ParseDict(parameters_dict, Value())
    endpoint = client.endpoint_path(
        project=project, location=location, endpoint=endpoint_id
    )
    response = client.predict(
        endpoint=endpoint, instances=instances, parameters=parameters
    )
    print("response")
    print(" deployed_model_id:", response.deployed_model_id)
    # The predictions are a google.protobuf.Value representation of the model's predictions.
    predictions = response.predictions
    for prediction in predictions:
        print(" prediction:", prediction)

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽器。