code: def attach(self, droplet_id, region):
          
          return self.get_data(
              "volumes/%s/actions/" % self.id,
              type=POST,
              params={"type": "attach",
                      "droplet_id": droplet_id,
                      "region": region}
          )
docs: Attach a Volume to a Droplet.
  
          Args:
              droplet_id: int - droplet id
              region: string - slug identifier for the region