feat(sample): add list user lists sample

Change-Id: I3a7dd56a7f5fdefd2210cd859dc29a383c7411ce

Author: jradcliff

samples/audiences/list_user_lists.py

@@ -0,0 +1,153 @@
+#!/usr/bin/env python
+# Copyright 2026 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.
+"""Sample of retrieving all user lists from an operating account."""
+
+
+import argparse
+import logging
+from typing import Dict, List, Optional
+
+from google.ads import datamanager_v1
+
+_logger = logging.getLogger(__name__)
+
+
+def main(
+    operating_account_type: datamanager_v1.ProductAccount.AccountType,
+    operating_account_id: str,
+    login_account_type: Optional[
+        datamanager_v1.ProductAccount.AccountType
+    ] = None,
+    login_account_id: Optional[str] = None,
+    linked_account_type: Optional[
+        datamanager_v1.ProductAccount.AccountType
+    ] = None,
+    linked_account_id: Optional[str] = None,
+) -> None:
+    """Runs the sample.
+
+    Args:
+     operating_account_type: the account type of the operating account.
+     operating_account_id: the ID of the operating account.
+     login_account_type: the account type of the login account.
+     login_account_id: the ID of the login account.
+     linked_account_type: the account type of the linked account.
+     linked_account_id: the ID of the linked account.
+    """
+
+    # Validates parameter pairs.
+    if bool(login_account_type) != bool(login_account_id):
+        raise ValueError(
+            "Must specify either both or neither of login account type and login account ID"
+        )
+    if bool(linked_account_type) != bool(linked_account_id):
+        raise ValueError(
+            "Must specify either both or neither of linked account type and linked account ID"
+        )
+
+    # Creates a dictionary to pass header metadata.
+    headers = []
+
+    if login_account_id:
+        headers.append(
+            (
+                "login-account",
+                f"accountTypes/{login_account_type}/accounts/{login_account_id}",
+            )
+        )
+
+    if linked_account_id:
+        headers.append(
+            (
+                "linked-account",
+                f"accountTypes/{linked_account_type}/accounts/{linked_account_id}",
+            )
+        )
+
+    call_kwargs = {"metadata": headers}
+
+    # Creates a client for UserListService.
+    user_list_client = datamanager_v1.UserListServiceClient()
+
+    # Sends the request. The client library returns an iterator that automatically fetches all
+    # response pages.
+    response_pager: iter = user_list_client.list_user_lists(
+        parent=f"accountTypes/{operating_account_type}/accounts/{operating_account_id}",
+        **call_kwargs,
+    )
+
+    user_list_num = 0
+    for user_list in response_pager:
+        user_list_num += 1
+        _logger.info("User list #%d:\n%s\n", user_list_num, user_list)
+
+    _logger.info("Total count of user list resources: %d", user_list_num)
+
+
+if __name__ == "__main__":
+    # Configures logging.
+    logging.basicConfig(level=logging.INFO)
+
+    parser = argparse.ArgumentParser(
+        description=("Retrieves all users lists from an operating account."),
+        fromfile_prefix_chars="@",
+    )
+    # The following argument(s) should be provided to run the example.
+    parser.add_argument(
+        "--operating_account_type",
+        type=str,
+        required=True,
+        help="The account type of the operating account.",
+    )
+    parser.add_argument(
+        "--operating_account_id",
+        type=str,
+        required=True,
+        help="The ID of the operating account.",
+    )
+    parser.add_argument(
+        "--login_account_type",
+        type=str,
+        required=False,
+        help="The account type of the login account.",
+    )
+    parser.add_argument(
+        "--login_account_id",
+        type=str,
+        required=False,
+        help="The ID of the login account.",
+    )
+    parser.add_argument(
+        "--linked_account_type",
+        type=str,
+        required=False,
+        help="The account type of the linked account.",
+    )
+    parser.add_argument(
+        "--linked_account_id",
+        type=str,
+        required=False,
+        help="The ID of the linked account.",
+    )
+    args = parser.parse_args()
+
+    main(
+        args.operating_account_type,
+        args.operating_account_id,
+        args.login_account_type,
+        args.login_account_id,
+        args.linked_account_type,
+        args.linked_account_id,
+    )