added Hello Neptune

Author: scmacdon

python/example_code/ne[tune/HelloNeptune.py

@@ -0,0 +1,31 @@
+#  Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#  SPDX-License-Identifier: Apache-2.0
+
+# snippet-start:[neptune.python.hello.main]
+import boto3
+
+def describe_db_clusters(neptune_client):
+    """
+    Describes the Amazon Neptune DB clusters synchronously using a single call.
+
+    :param neptune_client: Boto3 Neptune client
+    """
+    response = neptune_client.describe_db_clusters()
+    for cluster in response.get("DBClusters", []):
+        print(f"Cluster Identifier: {cluster['DBClusterIdentifier']}")
+        print(f"Status: {cluster['Status']}")
+
+
+def main():
+    """
+    Main entry point: creates the Neptune client and calls the describe operation.
+    """
+    neptune_client = boto3.client("neptune")
+    try:
+        describe_db_clusters(neptune_client)
+    except Exception as e:
+        print(f"Error describing DB clusters: {str(e)}")
+
+if __name__ == "__main__":
+    main()
+# snippet-end:[neptune.python.hello.main]

python/example_code/ne[tune/NeptuneScenario.py

@@ -2,12 +2,12 @@
 #  SPDX-License-Identifier: Apache-2.0
 
 
+# snippet-start:[neptune.python.scenario.main]
 import boto3
 import time
-from datetime import timedelta
 import botocore.exceptions
 
-# Constants
+# Constants used in this scenario
 POLL_INTERVAL_SECONDS = 10
 TIMEOUT_SECONDS = 1200  # 20 minutes
 
@@ -301,7 +301,6 @@ def get_subnet_ids(vpc_id: str) -> list[str]:
     subnet_ids = [subnet['SubnetId'] for subnet in subnets if 'SubnetId' in subnet]
     return subnet_ids
 
-
 def get_default_vpc_id() -> str:
     ec2_client = boto3.client('ec2')
     describe_vpcs_request = {
@@ -419,6 +418,9 @@ def run_scenario(neptune_client, subnet_group_name: str, db_instance_id: str, cl
 
 def main():
     neptune_client = boto3.client('neptune')
+
+    # Customize the following names to match your Neptune setup
+    # (You must change these to unique values for your environment)
     subnet_group_name = "neptuneSubnetGroup75"
     cluster_name = "neptuneCluster75"
     db_instance_id = "neptuneDB75"
@@ -436,6 +438,6 @@ def main():
     https://docs.aws.amazon.com/code-library/latest/ug/what-is-code-library.html
     """)
 
-
 if __name__ == "__main__":
     main()
+# snippet-end:[neptune.python.scenario.main]