Failed to display Jupyter Widget of type HBox

[sumtopmus]

Getting this message when running a loop with tnrange:

for i in tnrange(10):
    print(i)

Failed to display Jupyter Widget of type HBox.
If you're reading this message in Jupyter Notebook or JupyterLab, it may mean that the widgets JavaScript is still loading. If this message persists, it likely means that the widgets JavaScript library is either not installed or not enabled. See the Jupyter Widgets Documentation for setup instructions.
If you're reading this message in another notebook frontend (for example, a static rendering on GitHub or NBViewer), it may mean that your frontend doesn't currently support widgets.

Was working fine yesterday, not even sure what is different today. Here is the same issue mentioned in bstriner/keras-tqdm#18.

MacOS X 10.13
Chrome 61.0.3163.100
Python 3.6.2 (virtualenv)
Jupyter 4.3.0
ipython 6.2.0
ipykernel 4.6.1
ipywidgets 7.0.1
widgetsnbextension 3.0.3
tqdm 4.17.1

[chengs]

Is your notebook untrusted?
You shall trust the notebook to make JS widgets loaded correctly.

[sumtopmus]

The issue mysteriously disappeared so I cannot check that now. But probably you are right, it became trusted and everything started working again. I guess you can close the issue because I have no idea how to reproduce it.

[casperdcl]

such transience much superficial fun temperamental lol

[kkaiser]

I still have this issue also with trusted notebooks.

tqdm-4.19.4
widgetsnbextension==3.0.6
ipykernel==4.6.1
ipython==6.2.1
ipywidgets==7.0.3
notebook-5.2.0

EDIT: It seems to be unrelated to tqdm I downgraded to ipywidgets==6.0.0 and it works again not sure at what version it actually breaks.

[kwierman]

I'm still having this issue and it persists through a number of versions, including all those listed above. Why was this closed?

[chengs]

It may not be the problem of tqdm.
@kkaiser @kwierman try this code in the jupyter-notebook. If it works properly, you will see a progress bar. If not, you need to check the installation of ipywidgets

from ipywidgets import IntProgress
IntProgress(10,max=100)

[casperdcl]

@kwierman judging by all the comments, this definitely appears to be an upstream issue. You should probably search and/or open an issue at https://github.com/jupyter/notebook/issues?q=tqdm

[kwierman]

@chengs @casperdcl Much thanks. IntProgress shows the same error. Definitely upstream.

[nilday]

Has anyone solve the problem?

[chengs]

@nilday actually, this is not a problem of tqdm. according to my experience, the problem can be solved in most of cases by updating the jupypter and ipython to their latest versions and then reinstalling the ipywidgets (https://github.com/jupyter-widgets/ipywidgets). Wish this could help.

P.S. 春节还工作啊？辛苦辛苦啊

[kwierman]

@nilday @chengs . On my end, it looks like an update to jupyter has solved the problem. I think this issue can be closed.

[casperdcl]

If anyone can suggest which versions do/don't work (so we can create a requirements-notebook.txt) that would be great

[Bubblbu]

Updating jupyter/ipython & reinstalling ipywidgets did not work for me, until I realised that I had not installed the JupyterLab Extension for Jupyter Widgets.

jupyter labextension install @jupyter-widgets/jupyterlab-manager according to Jupyter Widgets docs solved the problem for me.

[ehsanfathi77]

try this for running jupyter:
python -m IPython notebook

it solved my problem.

[zhengjxu]

jupyter nbextension enable --py widgetsnbextension this works for me

[gferon]

jupyter nbextension enable --py widgetsnbextension this works for me

It also solved the issue for me, maybe it should be mentioned in the doc? I can open a quick PR if people here agree.

[casperdcl]

because of https://github.com/tqdm/tqdm/blob/master/tqdm/_tqdm_notebook.py#L111-L113 you should get an ImportError mentioning https://ipywidgets.readthedocs.io/en/stable/user_install.html which in turn says

# pip
pip install ipywidgets
jupyter nbextension enable --py widgetsnbextension # --sys-prefix # if in venv
# conda
conda install -c conda-forge ipywidgets

and possibly jupyter labextension install @jupyter-widgets/jupyterlab-manager.

[gingeard]

I've tried to install a clean environment with Python 3.8.1 and it's work. With Python 3.7.1, but with the same versions of packages, I was seeing only "HBox..." instead of widgets.