def __init__(self):
     ShelveryEngine.__init__(self)
     self.redshift_client = AwsHelper.boto3_client(
         'redshift', arn=self.role_arn, external_id=self.role_external_id)
     # default region will be picked up in AwsHelper.boto3_client call
     self.region = boto3.session.Session().region_name
 def __init__(self):
     ShelveryEngine.__init__(self)
     # default region will be picked up in AwsHelper.boto3_client call
     self.region = boto3.session.Session().region_name
 def __init__(self):
     ShelveryEngine.__init__(self)
     self.ec2client = boto3.client('ec2')
     # default region will be picked up in boto3.client call
     self.region = boto3.session.Session().region_name