experimental/cuda-ubi9/: comm-0.2.2 metadata and description

Simple index

Jupyter Python Comm implementation, for usage in ipykernel, xeus-python etc.

author Jupyter contributors
  • Framework :: Jupyter
  • License :: OSI Approved :: BSD License
  • Programming Language :: Python
  • Programming Language :: Python :: 3
description_content_type text/markdown
keywords ipykernel,jupyter,xeus-python
license BSD 3-Clause License Copyright (c) 2022, Jupyter All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  • Homepage, https://github.com/ipython/comm
provides_extras test
  • traitlets>=4
  • pytest; extra == 'test'
requires_python >=3.8
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Python Wheel


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

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()