types-boto3-rds

import boto3 from typing import TYPE_CHECKING, List import os if TYPE_CHECKING: from types_boto3_rds.client import RDSClient from types_boto3_rds.type_defs import DBInstanceTypeDef, DescribeDBInstancesOutputTypeDef def get_typed_rds_client() -> "RDSClient": """Returns a type-hinted RDS client.""" # AWS credentials typically managed by boto3's default credential chain # or environment variables (AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION) # Example of setting region via environment variable for client creation: aws_region = os.environ.get('AWS_REGION', 'us-east-1') return boto3.client("rds", region_name=aws_region) def list_db_instances_typed() -> List["DBInstanceTypeDef"]: """Lists all available DB instances with type hints.""" rds_client: "RDSClient" = get_typed_rds_client() try: response: "DescribeDBInstancesOutputTypeDef" = rds_client.describe_db_instances() db_instances: List["DBInstanceTypeDef"] = response.get("DBInstances", []) print(f"Found {len(db_instances)} DB instances:") for instance in db_instances: print(f"- Identifier: {instance.get('DBInstanceIdentifier')}, Status: {instance.get('DBInstanceStatus')}, Engine: {instance.get('Engine')}") return db_instances except Exception as e: print(f"Error describing DB instances: {e}") return [] if __name__ == "__main__": # Set a dummy region for local testing if not already set if 'AWS_REGION' not in os.environ: os.environ['AWS_REGION'] = 'us-east-1' list_db_instances_typed()