code: def attach_volume(self, volume, device="/dev/sdp"):
          
          if hasattr(volume, "id"):
              volume_id = volume.id
          else:
              volume_id = volume
          return self.ec2.attach_volume(volume_id=volume_id, instance_id=self.instance_id, device=device)
docs: Attach an EBS volume to this server
  
          :param volume: EBS Volume to attach
          :type volume: boto.ec2.volume.Volume
  
          :param device: Device to attach to (default to /dev/sdp)
          :type device: string