code: def purchase_reserved_instance_offering(self,
                                              reserved_instances_offering_id,
                                              instance_count=1):
          
          params = {
              'ReservedInstancesOfferingId' : reserved_instances_offering_id,
              'InstanceCount' : instance_count}
          return self.get_object('PurchaseReservedInstancesOffering', params,
                                 ReservedInstance, verb='POST')
docs: Purchase a Reserved Instance for use with your account.
          ** CAUTION **
          This request can result in large amounts of money being charged to your
          AWS account.  Use with caution!
  
          :type reserved_instances_offering_id: string
          :param reserved_instances_offering_id: The offering ID of the Reserved
                                                 Instance to purchase
  
          :type instance_count: int
          :param instance_count: The number of Reserved Instances to purchase.
                                 Default value is 1.
  
          :rtype: :class:`boto.ec2.reservedinstance.ReservedInstance`
          :return: The newly created Reserved Instance