import sys
import botocore
import boto3
from botocore.exceptions import ClientError
def lambda_handler(event, context):
   rds = boto3.client('rds')
   lambdaFunc = boto3.client('lambda')
   print('Trying to get Environment variable')

   try:
       funcResponse = lambdaFunc.get_function_configuration(
           FunctionName='StopRDSInstances'
       )
       DBinstance = funcResponse['Environment']['Variables']['DBInstanceName']
       print('Stopping RDS service for DBInstance : ' + DBinstance)
   except ClientError as e:
       print(e)
   try:
       response = rds.stop_db_instance(
           DBInstanceIdentifier=DBinstance
       )
       print('Success :: ')
       return response
   except ClientError as e:
       print(e)
   return
   {
       'message' : "Script execution completed. See Cloudwatch logs for complete output"
   }