Merchant API code sample to list product reviews.

### Java

    // Copyright 2023 Google LLC
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    //     https://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.

    package shopping.merchant.samples.reviews.v1;

    import com.google.api.gax.core.FixedCredentialsProvider;
    import com.google.auth.oauth2.GoogleCredentials;
    import com.google.shopping.merchant.reviews.v1.ListProductReviewsRequest;
    import com.google.shopping.merchant.reviews.v1.ProductReview;
    import com.google.shopping.merchant.reviews.v1.ProductReviewsServiceClient;
    import com.google.shopping.merchant.reviews.v1.ProductReviewsServiceClient.ListProductReviewsPagedResponse;
    import com.google.shopping.merchant.reviews.v1.ProductReviewsServiceSettings;
    import shopping.merchant.samples.utils.Authenticator;
    import shopping.merchant.samples.utils.Config;

    /** This class demonstrates how to list all the product reviews in a given account. */
    public class ListProductReviewsSample {

      public static void listProductReviews(String accountId) throws Exception {
        GoogleCredentials credential = new Authenticator().authenticate();

        ProductReviewsServiceSettings productReviewsServiceSettings =
            ProductReviewsServiceSettings.newBuilder()
                .setCredentialsProvider(FixedCredentialsProvider.create(credential))
                .build();

        try (ProductReviewsServiceClient productReviewsServiceClient =
            ProductReviewsServiceClient.create(productReviewsServiceSettings)) {

          ListProductReviewsRequest request =
              ListProductReviewsRequest.newBuilder()
                  .setParent(String.format("accounts/%s", accountId))
                  .build();

          System.out.println("Sending list product reviews request:");
          ListProductReviewsPagedResponse response =
              productReviewsServiceClient.listProductReviews(request);

          int count = 0;

          // Iterates over all rows in all pages and prints all product reviews.
          for (ProductReview element : response.iterateAll()) {
            System.out.println(element);
            count++;
          }
          System.out.print("The following count of elements were returned: ");
          System.out.println(count);
        } catch (Exception e) {
          System.out.println(e);
        }
      }

      public static void main(String[] args) throws Exception {
        Config config = Config.load();
        listProductReviews(config.getAccountId().toString());
      }
    }

### PHP

    <?php
    /**
     * Copyright 2025 Google LLC
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *     https://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

    require_once __DIR__ . '/../../../vendor/autoload.php';
    require_once __DIR__ . '/../../Authentication/Authentication.php';
    require_once __DIR__ . '/../../Authentication/Config.php';
    use Google\ApiCore\ApiException;
    use Google\Shopping\Merchant\Reviews\V1alpha\Client\ProductReviewsServiceClient;
    use Google\Shopping\Merchant\Reviews\V1alpha\ListProductReviewsRequest;

    /**
     * This class demonstrates how to list all the product reviews in a given account.
     */
    class ListProductReviewsSample
    {
        /**
         * Lists all product reviews for a given account.
         *
         * @param array $config The configuration data for authentication and account ID.
         */
        public static function listProductReviewsSample(array $config): void
        {
            // Gets the OAuth credentials to make the request.
            $credentials = Authentication::useServiceAccountOrTokenFile();

            // Creates options config containing credentials for the client to use.
            $options = ['credentials' => $credentials];

            // Creates a client.
            $productReviewsServiceClient = new ProductReviewsServiceClient($options);

            // The parent account from which to retrieve reviews.
            // Format: accounts/{account}
            $parent = sprintf('accounts/%s', $config['accountId']);

            // Creates the request message.
            $request = (new ListProductReviewsRequest())
                ->setParent($parent);

            // Calls the API and catches and prints any network failures/errors.
            try {
                printf("Sending list product reviews request:%s", PHP_EOL);
                $response = $productReviewsServiceClient->listProductReviews($request);

                $count = 0;
                // Iterates over all rows in all pages and prints all product reviews.
                foreach ($response->iterateAllElements() as $element) {
                    printf("%s%s", $element->serializeToJsonString(), PHP_EOL);
                    $count++;
                }
                printf("The following count of elements were returned: %d%s", $count, PHP_EOL);
            } catch (ApiException $e) {
                print $e->getMessage() . PHP_EOL;
            }
        }

        /**
         * Helper to execute the sample.
         */
        public function callSample(): void
        {
            $config = Config::generateConfig();
            self::listProductReviewsSample($config);
        }
    }

    // Run the script.
    $sample = new ListProductReviewsSample();
    $sample->callSample();

### Python

    # -*- coding: utf-8 -*-
    # Copyright 2025 Google LLC
    #
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    #     http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.
    """This class demonstrates how to list all the product reviews in a given account."""

    from examples.authentication import configuration
    from examples.authentication import generate_user_credentials
    from google.shopping.merchant_reviews_v1alpha import ListProductReviewsRequest
    from google.shopping.merchant_reviews_v1alpha import ProductReviewsServiceClient


    def list_product_reviews(account_id: str) -> None:
      """Lists all product reviews for a given account.

      Args:
        account_id: The ID of the Merchant Center account.
      """
      # Gets OAuth credentials.
      credentials = generate_user_credentials.main()

      # Creates a client.
      client = ProductReviewsServiceClient(credentials=credentials)

      # The parent account from which to retrieve reviews.
      # Format: accounts/{account}
      parent = f"accounts/{account_id}"

      # Creates the request.
      request = ListProductReviewsRequest(parent=parent)

      # Makes the request and catches and prints any error messages.
      try:
        print("Sending list product reviews request:")
        response = client.list_product_reviews(request=request)

        count = 0
        # Iterates over all reviews in all pages and prints them.
        for element in response:
          print(element)
          count += 1
        print(f"The following count of elements were returned: {count}")

      except RuntimeError as e:
        print(e)


    if __name__ == "__main__":
      # Gets the merchant account ID from the user.
      merchant_account_id = configuration.Configuration().read_merchant_info()
      list_product_reviews(merchant_account_id)