TensorBase Subclass - Strange behaviour

fastai
1

Hi all,

I’m trying to implement a subclass of TensorBase (to preserve some metadata up to the showbatch commands) but I see a strange phenomenon:

  • Different instances are of my class are created by the DataBlocks
  • When i call show on the batched instances - the are all the same…

Notebook is here:
https://colab.research.google.com/drive/1U9lBwcNjRyEN1Du0t01nSrmD9AbHEZ2i?usp=sharing

This is my class and the datablock

image
image1457×575 31.3 KB

But when i load the data into a batch, we see that it creates the different instances (in blue), but the show() methods all show the same object in the batch (in red)

image
image1426×476 25.9 KB

What am I doing wrong?

Thanks,
Andrea