About the question of "cannot be accessed from here".

[icecream-Tnak]

Thanks for your elegant algorithm! However, I meet the follow question when try to run your code

The tensor <tf.Tensor 'cheb_conv_with__att_gl/strided_slice_1:0' shape=() dtype=int32>
cannot be accessed from here, because it was defined in 
FuncGraph(name=cheb_conv_with__att_gl_scratch_graph, 
id=1850599452880),  which is out of scope.

Could you help me? Our version of Tensorflow is 2.x which different with the version your recommend. Is it because of different versions?

[NingXJ1999]

Tensorflow 1.x to 2.0 is a major update, and some functions are no longer compatible.
Please try to use the environment of Tensorflow 1.15 to run the code.