Repository navigation
[BUG] Issue running Dash on Google Colab (with proposed solution) #3657
Description
Hello!
I was running Dash on Google Colab, and I found that (even after installing dash) the recommended code did not work. It turns out, the default Google Colab environment does not include Dash or comm, and that package looks to be required for it to work. In other words, the comm requirement seems to be causing issues ...
Proposal
- Adjust/Add documentation on Google Colab to include the Dash/comm package install issue
- Adjust/Loosen (?) the
commpackage requirement
Current Example
Right now, this seems to work:
First, install packages:
!pip install dash comm
Then, choose app run option.
app.run(debug=True, jupyter_mode='inline', jupyter_height=800)
# OPTIONAL: create url to open in new tab (requires runtime restart)
# app.run(debug=True, host='localhost', jupyter_mode='external')
Thanks!
Metadata
Metadata
Assignees
Labels
No labels
Activity
camdecoster commentedon Mar 18, 2026
Thanks for the report! The team will take a look when we have time and follow up.
T4rk1n commentedon Mar 18, 2026
Seems like
commis usually included from another dependency, since it's used directly it should be added torequirements/install.txtleontoddjohnson commentedon May 7, 2026
Hey! Just following up on this. Is the issue that we only need to add
commto this install.txt file?T4rk1n commentedon Jul 17, 2026
Yes
leontoddjohnson commentedon Jul 17, 2026
Cool. I'm happy to make the update and do a pull request if that's what you guys prefer!
I just didn't know if this was an internal fix thing, or if I'd be stepping on toes.
T4rk1n commentedon Jul 17, 2026
Thanks, that would be appreciated.
Add 'comm' to install requirements
leontoddjohnson commentedon Jul 17, 2026
Please see PR! I assumed the dev branch was the best place to make this request for.
T4rk1n commentedon Jul 21, 2026
Fixed by #3903