ImageClassifierCleaner does not load the widgets

I am continuing from my first lesson of bird_or_forest and following along the second lesson on fastbook. I am trying to run the following cell:

cleaner = ImageClassifierCleaner (learn)

Where learn is of type vision_learner
The output is stuck with a message

Loading widget…

There are no dropdown boxes to allow me to edit or delete.
Also, the images are printed in column not horizontal.
I am on Kaggel and I am on Firefox browser on Mac, if that matters.


Same issue, any suggestions ? have you got it resolved ?

Nope. That is still an open issue. There are some reports about this. My understanding so far is that it has got to do with ipywidgets. As suggested here, I tried to upgrade ipywidgets, and I got an incompatibility error.
This issue is discussed here too. But, no solution.
Please update this issue if have this resolved.

It seems to be working on Google Colab.

1 Like

Mine outputs like this:

KeyError Traceback (most recent call last)
File ~/miniconda3/envs/fastbook/lib/python3.10/site-packages/PIL/, in _save(im, fp, filename)
638 try:
→ 639 rawmode = RAWMODE[im.mode]
640 except KeyError as e:

Anything useful?


Chiming in here. I can’t get ImageClassifierCleaner to work on kaggle or on Jupyter on my local machine. I’ve searched the forums and tried all the suggestions I’ve found.

Struggled with this myself for several days trying to get ImageClassifierCleaner running in Kaggle.

A few findings that may (or may not) be useful for others:

  • The ImageClassifierCleaner class depends on ipywidgets. It was unclear if ipywidgets works on Kaggle - it does. After installing various dependency combinations, I was able to get the FastAI Vision widgets working with the default, preinstalled versions of fastai and ipywidgets on Kaggle (as of 3/19/24)

** fastai version: 2.7.14
** ipywidgets version: 7.7.1

  • ImageClassifierCleaner does not seem to be able to handle large datasets. The best I could manage was 7 categories with 30 training examples in each (~210 images in total).

  • Loading 210 images into ImageClassifierCleaner was a struggle. I wasn’t able to edit the full data set at once - the widget would freeze when changing categories.

  • Re-running the cell with the cleaner code would allow me to continue editing to an extent. Eventually even re-running the cell would freeze before I could get through the full data set.

  • “Restart & Clear Cell Outputs” on the Kaggle session would allow me to restart clean and walk through the entire notebook again to resume cleaning. It took several iterations of restarting the notebook to fully clean all seven image categories.

  • Edits (delete/change) do not seem to be persisted on the cleaner object when changing categories. I needed to run cleaner.delete / cleaner.change before changing categories.

  • Limiting the maximum number of images displayed helped, cleaner = ImageClassifierCleaner(learn, max_n=5) for instance. I was able to progressively expand cleaning by increasing n_max and iterating. Ultimately I was forced to load the full dataset as I am not aware of any way to paginate the data for cleaning.