Golang Model sessionn上的Tensorflow运行错误：nil-Operation。 如果输出是使用Scope对象创建的，请参见Scope.Err（）了解详细信息

Question

iam use golang with tensorflow model. With this code : ```

    output, err := sessionModel.Run(
    map[tf.Output]*tf.Tensor{
        graphModel.Operation("input").Output(0): tensor,
    },
    []tf.Output{
        graphModel.Operation("output").Output(0),
    },
    nil)

```

But show error : 2019/01/07 18:07:48 http: panic serving [::1]:55262: nil-Operation. If the Output was created with a Scope object, see Scope.Err() for details.

I am already check tensor contain tensor from image file. Any recomendation ? Thanks anyway

Answer 1

The error says the Output attribute (of a certain the node) is a nil operation.

Hence graphModel.Operation("input").Operation(0) or graphModel.Operation("output").Output(0) returns nil.

To correct this, you have to refer to an existing node in the graph because there's no a tensor named input or a tensor named output in the graph.

From the python code you used to export the model you can find the complete name of your input and output tensors. Just access the .name attribute of your input placeholder and of your output node, to get the correct name to use in Go.

Also, the Go bindings are complex to use, especially if you want to run some preprocessing operations on the input image. I suggest you use galeone/tfgo instead of directly using the bindings (Note that I am the author of this repo).