Describe your context
Please provide us your environment, so we can easily reproduce the issue.

dash 3.2.0
dash-bootstrap-components 2.0.4
django-plotly-dash 2.5.0

• OS: macOS (Darwin 24.6.0)
• Python: 3.12
• Environment: Testing/Development with pytest

Describe the bug

Dash's Jupyter integration (dash/_jupyter.py) is using the deprecated ipykernel.comm.Comm class, which generates deprecation warnings during test runs and when importing Dash in Jupyter environments.

Warning output:

/path/to/.venv/lib/python3.12/site-packages/dash/_jupyter.py:30: DeprecationWarning:

The ipykernel.comm.Comm class has been deprecated. Please use the comm module instead.
For creating comms, use the function from comm import create_comm.

Root cause:

• Line 25: from ipykernel.comm import Comm
• Line 30: _dash_comm = Comm(target_name="dash")

Expected behavior

No deprecation warnings should appear when using Dash. The code should use the modern comm module API instead of the deprecated ipykernel.comm.Comm.

Proposed fix:

# Replace line 25:
from comm import create_comm

# Replace line 30:
_dash_comm = create_comm(target_name="dash")

This is a non-breaking change that would clean up test output and ensure future compatibility with newer ipykernel versions.