Any insight on that Fuel transformers problem?

[antaki....@gmail.com]

Hi!

I am relatively new user of Fuel and, so far, i like it much. I've been using it with Blocks framework. My question concerns Fuel transformers.

I am actually a bit stuck with the following situation :
- I have a data_stream which I iterate on with the Window transformer
- I have a Sourcewise transformer calculating MFCC which implements "transform_source_batch" and "transform_source_example"
- I want to apply the MFCC only on the source stream and try to predict the unmodified targets.

Both transformers works when use alone.

I've been trying to do a transformer that would inherit from both class however I now have an AttributeError : object has no attribute "child_epoch_iterator". I've found the following issue that seems to be somewhat related https://github.com/mila-udem/fuel/issues/106.

So maybe multiple heritage wasn't a good idea. How should I proceed foward?

Good day,
Vincent