name 'HTML' is not defined

[tuzhucheng]

When I'm trying to run the following from fast.ai v3 lesson 3 IMDB notebook:

data_lm = TextDataBunch.from_csv(path, 'texts.csv')

I get the following error:

/opt/conda/lib/python3.7/site-packages/fastprogress/fastprogress.py in on_iter_begin(self)
    160 
    161     def on_iter_begin(self):
--> 162         if self.display: self.out = display(HTML(self.progress), display_id=True)
    163         self.is_active=True
    164 

NameError: name 'HTML' is not defined

Here are the library versions:

• fastai-1.0.52
• fastprogress-0.1.21

[sgugger]

That is really weird. In which environment are you? Normally you should have seen a warning if HTML wasn't properly imported.

[tuzhucheng]

I obtained this in the Jupyter Lab environment. However, even if I change from Jupyter Lab to Jupyter notebook by changing /lab to /tree I still get this error.

[sgugger]

In jupyter lab, you need to type this after installing ipywidgets

jupyter labextension install @jupyter-widgets/jupyterlab-manager

More generally, it seems there is something broken with your installation of ipywidgets, try reinstalling it?

[sgugger]

This has not been addressed in a while, so closing.