# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0

# snippet-start:[python.example_code.redshift.Hello]
import boto3


def hello_redshift(redshift_client):
    """
    Use the AWS SDK for Python (Boto3) to create an Amazon Redshift client and list
    the clusters in your account. This list might be empty if you haven't created
    any clusters.
    This example uses the default settings specified in your shared credentials
    and config files.

    :param redshift_client: A Boto3 Redshift Client object.
    """
    print("Hello, Redshift! Let's list your clusters:")
    paginator = redshift_client.get_paginator("describe_clusters")
    clusters = []
    for page in paginator.paginate():
        clusters.extend(page["Clusters"])

    print(f"{len(clusters)} cluster(s) were found.")

    for cluster in clusters:
        print(f"  {cluster['ClusterIdentifier']}")


if __name__ == "__main__":
    hello_redshift(boto3.client("redshift"))
# snippet-end:[python.example_code.redshift.Hello]