code: def start_instances(self, instance_ids=None):
          
          params = {}
          if instance_ids:
              self.build_list_params(params, instance_ids, 'InstanceId')
          return self.get_list('StartInstances', params,
                               [('item', Instance)], verb='POST')
docs: Start the instances specified
  
          :type instance_ids: list
          :param instance_ids: A list of strings of the Instance IDs to start
  
          :rtype: list
          :return: A list of the instances started