ImageClassifierData.from_paths cannot be called without transforms about fastai

[kkbrandt]

I assume you've read the discussion about this at http://forums.fast.ai/t/fastai-dataset-imageclassifierdata-from-paths-without-transformations/9778 ?
This seems like a reasonable requirement to me, since the user will need to specify the size of the images they want.
What behavior would you expect from passing no transform?
This seems to cause quite a bit of confusion, so at the very least we should have parameter checking here to display a better error message

[radekosmulski]

I was not aware of the conversation - thank you for pointing me to it.

On one hand I fully understand the argument for making the transforms necessary and this might be the way to go on this. Should clear some of the confusion (leaning towards this solution).

Wanted to say that on the other hand I am tempted by giving users the extra flexibility of just running images straight from a directory, but the more I think about it the less convinced I am that this is the way to go - especially as it might make the code unnecessarily complex.