Componentpedia / Listings / comm

Last update: 27/04/2026

comm

Python Comm implementation for the Jupyter kernel protocol

Latest version: 0.2.3 registry icon
Maintenance score
17
Safety score
100
Popularity score
9
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Security
  Vulnerabilities
Version Suggest Low Medium High Critical
0.2.3 0 0 0 0 0
0.2.2 0 0 0 0 0
0.2.1 0 0 0 0 0
0.2.0 0 0 0 0 0
0.1.4 0 0 0 0 0
0.1.3 0 0 0 0 0
0.1.2 0 0 0 0 0
0.1.1 0 0 0 0 0
0.1.0 0 0 0 0 0
0.0.1 0 0 0 0 0

Stability
Latest release:

0.2.3 - This version may not be safe as it has not been updated for a long time. Find out if your coding project uses this component and get notified of any reported security vulnerabilities with Meterian-X Open Source Security Platform

Licensing

Maintain your licence declarations and avoid unwanted licences to protect your IP the way you intended.

BSD   -   BSD License (Generic)

Is a wildcard

Not proprietary

OSI Compliant

Comm

It provides a way to register a Kernel Comm implementation, as per the Jupyter kernel protocol. It also provides a base Comm implementation and a default CommManager that can be used.

Register a comm implementation in the kernel:

Case 1: Using the default CommManager and the BaseComm implementations

We provide default implementations for usage in IPython:

import comm


class MyCustomComm(comm.base_comm.BaseComm):
    def publish_msg(self, msg_type, data=None, metadata=None, buffers=None, **keys):
        # TODO implement the logic for sending comm messages through the iopub channel
        pass


comm.create_comm = MyCustomComm

This is typically what ipykernel and JupyterLite's pyolite kernel will do.

Case 2: Providing your own comm manager creation implementation

import comm

comm.create_comm = custom_create_comm
comm.get_comm_manager = custom_comm_manager_getter

This is typically what xeus-python does (it has its own manager implementation using xeus's C++ messaging logic).

Comm users

Libraries like ipywidgets can then use the comms implementation that has been registered by the kernel:

from comm import create_comm, get_comm_manager

# Create a comm
comm_manager = get_comm_manager()
comm = create_comm()

comm_manager.register_comm(comm)