Tqdm notebook / trange prints nothing in Google Colab local runtime

[rnett]

• I have visited the [source website], and in particular
  read the [known issues]
• I have searched through the [issue tracker] for duplicates
• I have mentioned version numbers, operating system and
  environment, where applicable:

This is using the jupyter notebook support.

I have been trying to use the progress bar in Google Colab. It works fine when using the hosted runtime.

However, when I use a local time, nothing is shown at all.

To make things even weirder, it works just fine in jupyterlab on the local runtime, just not in Colab when using the local runtime.

For the hosted runtime:
Tqdm: 4.28.1
Python: 3.6.7
OS: [GCC 8.2.0] linux

For the local runtime:
Tqdm: 4.31.1
Python: 3.5.3
OS: [GCC 6.3.0 20170516] linux

Example:

from tqdm import tnrange as trange
from time import sleep

for i in trange(10):
  sleep(1)

Google Colab, Hosted Runtime: works
Google Colab, Local Runtime: fails, shows nothing
Jupyter Lab, Local Runtime: works

[casperdcl]

duplicate of #558? Does #640 help?

[rnett]

#640 does not help. I suspect its a separate issue or a versioning issue as it runs fine in hosted colab and local jupyterlab, just not local colab.

[chengs]

#640 is not designed for this issue.

@rnett You seems to use local jupyter as a backend of Colab. I understand this but don't see the reason: can't you just use jupyter-labl locally?

This issue is hard to fix. Ipython budgets will register a JavaScript script in the Jupyter to show all the progress bar. Apparently, the JavaScript script cannot be registered into Colab frontend. And tqdm has nothing to do for this issue. Fixing it requires Ipywidgets or Colab change their implementations, not us.

[chengs]

@casperdcl I close this due to my investigation above.

[pharringtonp19]

Any updates on this issue?