ipython/ipykernel

IPython Kernel for Jupyter

Stars: 734
Forks: 411
Open beginner issues: 1
Indexed issues: 285
Avg merge: 1d 2h
Merged PRs (30d): 9

Dominant language: Python
License: BSD-3-Clause
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 17, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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post_execute fires during comm_msg handling on a subshell, so output published from the hook is parented to the comm_msg and dropped by frontends Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ipython/ipykernel#1564 · Opened Sep 21, 2026
Shell reply sent raw on the ROUTER can drop the ZMQStream wake-up; a request arriving in that window is not read until the next connection Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

ipython/ipykernel#1554 · 1 comment · Opened Sep 7, 2026
Interrupt on swallowed `KeyboardInterrupt` exceptions (`SIGINT`) when pressing twice (within 5 seconds) Open

ipython/ipykernel#1550 · 1 comment · 1 reaction · 1 assignee · Opened Aug 25, 2026
Removing `@register_integration("asyncio")` and `def loop_asyncio(kernel):` Open

Difficulty 3/5 1-2 days Newbie friendliness 66/100

ipython/ipykernel#1532 · Opened Jun 18, 2026
Segfault launching ipykernel on Python 3.12.3 in VS Code Jupyter (works on Python 3.11) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1512 · Opened Apr 16, 2026
ipykernel 7.x does not schedule async background tasks after cell completion Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1510 · Opened Mar 12, 2026
Log messages written from a helper thread appear in the wrong notebook cell (regression) Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

ipython/ipykernel#1491 · 1 comment · Opened Jan 27, 2026
how to integrate custom event loop in ipykernel 7.x Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ipython/ipykernel#1490 · 2 comments · Opened Jan 13, 2026
Using the recent ipykernel 7.x causes plots to not show up from ipympl widgets. Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ipython/ipykernel#1476 · 1 comment · 1 reaction · Opened Nov 19, 2025
Shows wrong python version in "Select a Python Environment" Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ipython/ipykernel#1474 · Opened Nov 12, 2025
Freezes in nbclassic with ipykernel 7.1 Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ipython/ipykernel#1471 · 3 comments · 1 reaction · Opened Nov 10, 2025
ipykernel should use default `WindowsProactorEventLoopPolicy` rather than `WindowsSelectorEventLoopPolicy` for windows Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ipython/ipykernel#1468 · 1 comment · 3 reactions · Opened Nov 5, 2025
ipykernel 7.0.1 - Jupyter autocomplete delay Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ipython/ipykernel#1452 · 2 comments · 4 reactions · Opened Oct 14, 2025
Inconsistent character encoding from windows output Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ipython/ipykernel#1449 · 1 comment · Opened Oct 14, 2025
ipykernel 7.0.0 release with subshells Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

ipython/ipykernel#1438 · 11 comments · 1 reaction · Opened Oct 9, 2025
Should initialization errors be exposed to the user? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ipython/ipykernel#1408 · Opened Jul 16, 2025
Ipykernel releases and branches Open

maintenance

Difficulty 5/5 Over a week Newbie friendliness 20/100

ipython/ipykernel#1399 · 3 comments · 1 reaction · Opened Jun 24, 2025
Update embedding examples Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ipython/ipykernel#1392 · 1 comment · Opened Apr 13, 2025
rerun cell with datafame make memory leak Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1391 · Opened Apr 13, 2025
enable_pylab broken on invalid kwarg with IPython 9.0 Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

ipython/ipykernel#1382 · Opened Mar 21, 2025
New event loop integration system Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ipython/ipykernel#1371 · 2 comments · Opened Feb 27, 2025
Coverage on CI is failing to report coverage Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1365 · 1 comment · Opened Feb 26, 2025
Subshell test flakiness Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ipython/ipykernel#1359 · 3 comments · Opened Feb 25, 2025
Raw mode without IPython Open

feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

ipython/ipykernel#1357 · Opened Feb 25, 2025
Reenable and fix qtconsole and spyder kernel downstream tests Open

bug maintenance

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ipython/ipykernel#1351 · 2 comments · Opened Feb 20, 2025
Running mypy via precommit with --install-type --non-interactive seem to silence some errors Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ipython/ipykernel#1336 · Opened Feb 17, 2025
Custom `loop_factory` for `asyncio` Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ipython/ipykernel#1313 · Opened Dec 20, 2024
Debugger does not conform to DAP specification Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

ipython/ipykernel#1303 · 1 comment · Opened Dec 10, 2024
test_pylab fails Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ipython/ipykernel#1301 · 1 comment · Opened Nov 30, 2024
`_eventloop_set` event called from non-async context Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ipython/ipykernel#1292 · Opened Nov 7, 2024
errors not reported in new async code Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1279 · Opened Oct 22, 2024
Publish alpha(s) and nightly on https://anaconda.org/scientific-python-nightly-wheels/ Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1274 · 2 comments · 3 reactions · Opened Oct 18, 2024
Infinite loop when using threadpool in notebook Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

ipython/ipykernel#1269 · 1 comment · 3 reactions · Opened Oct 2, 2024
close_loop coroutine instantiated but never awaited in (old?) asyncio loop integration Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ipython/ipykernel#1260 · 1 comment · Opened Aug 2, 2024
Using UDS for communication in debugger Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ipython/ipykernel#1258 · Opened Jul 18, 2024
Kernel crashes randomly: `IndexError: pop from an empty deque` Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ipython/ipykernel#1250 · 2 comments · 1 reaction · Opened Jun 18, 2024
cannot stop debugging session when there is long running evaluate request Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1245 · Opened May 31, 2024
Using the `--IPKernelApp.trio_loop=True` doesn't appear to set the main loop to use `trio` Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

ipython/ipykernel#1243 · Opened May 29, 2024
interrupt issues with async code Open

bug

ipython/ipykernel#1239 · 4 comments · 1 assignee · Opened May 22, 2024
Bug: Issue installing new kernel from main Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1238 · 2 comments · Opened May 22, 2024
Restore to previous state with copy-on-write Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ipython/ipykernel#1236 · 4 comments · Opened May 7, 2024
AnyIO commit breaks Matplotlib display in separate windows Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1235 · 5 comments · Opened May 3, 2024
Windows: ipykernel install prefix not usable for c:\programdata\jupyter Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ipython/ipykernel#1234 · Opened Apr 25, 2024
Different child termination behavior during Kernel shutdown on Posix and Windows systems Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1232 · 1 comment · 1 reaction · Opened Apr 18, 2024
Output [ ] Alone Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ipython/ipykernel#1228 · 2 comments · Opened Apr 4, 2024
"ModuleNotFoundError: No module named 'comm'" when running 'python -m ipykernel install' Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ipython/ipykernel#1225 · 1 comment · 1 reaction · Opened Mar 28, 2024
Feature request: enable editing_mode = ‘vi’ for a ZMQTerminalIPythonApp console Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

ipython/ipykernel#1215 · Opened Feb 28, 2024
Incorrect stack traceback when try except finally is used in jupyter notebooks with pandas Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ipython/ipykernel#1211 · Opened Feb 13, 2024
Directing output of out external threads/processes to specific cells Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

ipython/ipykernel#1199 · 1 comment · Opened Jan 18, 2024
Better cell magic by removing some of the syntax limitations Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ipython/ipykernel#1196 · Opened Jan 15, 2024

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