We need to add a simple function to our CNN example to ensure the model that gets produced is saved, so it can be managed as an object by Pachyderm. Let's add the following to main.go:

func (m *convnet) savemodel() (err error) {
  learnables := m.learnables()
  var f io.WriteCloser
  if f, err = os.OpenFile("model.bin", os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644); err != nil {
    return
  }
  defer f.Close()
  enc := json.NewEncoder(f)
  for _, l := range learnables {
    t := l.Value().(*tensor.Dense).Data() // []float32
    if err = enc.Encode(t); err != nil {
      return
    }
  }

  return nil
}