def get_s3_keys(s3_client, bucket, prefix=""):
    """ Get list of objects in specified S3 bucket
    """
    s3_response = s3_client.list_objects_v2(
                    Bucket=bucket,
                    Prefix=prefix
    )
    s3_object_keys = [o['Key'] for o in s3_response['Contents']]

    return s3_object_keys