Notebook for Python 3.14.0 won't connect to kernel

WordlessMeteor · October 14, 2025, 4:52am

I tried using jupyter notebook on two devices with Python 3.14.0 installed and the result was the same, always with a TimeOut warning when connecting to kernel. Please investigate it.

[I 2025-10-14 12:26:28.504 ServerApp] Kernel started: d72d5aec-73fc-4f28-b6b6-dd2acce0e46d
[W 2025-10-14 12:27:28.554 ServerApp] Timeout waiting for kernel_info reply from d72d5aec-73fc-4f28-b6b6-dd2acce0e46d

The following prompts list all dependancy libraries of jupyter and their versions.

C:\Users\19250>pip install jupyter
Requirement already satisfied: jupyter in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (1.1.1)
Requirement already satisfied: notebook in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter) (7.4.7)
Requirement already satisfied: jupyter-console in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter) (6.6.3)
Requirement already satisfied: nbconvert in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter) (7.16.6)
Requirement already satisfied: ipykernel in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter) (7.0.0)
Requirement already satisfied: ipywidgets in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter) (8.1.7)
Requirement already satisfied: jupyterlab in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter) (4.4.9)
Requirement already satisfied: comm>=0.1.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (0.2.3)
Requirement already satisfied: debugpy>=1.6.5 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (1.8.17)
Requirement already satisfied: ipython>=7.23.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (9.6.0)
Requirement already satisfied: jupyter-client>=8.0.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (8.6.3)
Requirement already satisfied: jupyter-core!=5.0.*,>=4.12 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (5.8.1)
Requirement already satisfied: matplotlib-inline>=0.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (0.1.7)
Requirement already satisfied: nest-asyncio>=1.4 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (1.6.0)
Requirement already satisfied: packaging>=22 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (25.0)
Requirement already satisfied: psutil>=5.7 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (7.1.0)
Requirement already satisfied: pyzmq>=25 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (27.1.0)
Requirement already satisfied: tornado>=6.2 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (6.5.2)
Requirement already satisfied: traitlets>=5.4.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipykernel->jupyter) (5.14.3)
Requirement already satisfied: colorama in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipython>=7.23.1->ipykernel->jupyter) (0.4.6)
Requirement already satisfied: decorator in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipython>=7.23.1->ipykernel->jupyter) (5.2.1)
Requirement already satisfied: ipython-pygments-lexers in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipython>=7.23.1->ipykernel->jupyter) (1.1.1)
Requirement already satisfied: jedi>=0.16 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipython>=7.23.1->ipykernel->jupyter) (0.19.2)
Requirement already satisfied: prompt_toolkit<3.1.0,>=3.0.41 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipython>=7.23.1->ipykernel->jupyter) (3.0.52)
Requirement already satisfied: pygments>=2.4.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipython>=7.23.1->ipykernel->jupyter) (2.19.2)
Requirement already satisfied: stack_data in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipython>=7.23.1->ipykernel->jupyter) (0.6.3)
Requirement already satisfied: wcwidth in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from prompt_toolkit<3.1.0,>=3.0.41->ipython>=7.23.1->ipykernel->jupyter) (0.2.14)
Requirement already satisfied: parso<0.9.0,>=0.8.4 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jedi>=0.16->ipython>=7.23.1->ipykernel->jupyter) (0.8.5)
Requirement already satisfied: python-dateutil>=2.8.2 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-client>=8.0.0->ipykernel->jupyter) (2.9.0.post0)
Requirement already satisfied: platformdirs>=2.5 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-core!=5.0.*,>=4.12->ipykernel->jupyter) (4.5.0)
Requirement already satisfied: pywin32>=300 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-core!=5.0.*,>=4.12->ipykernel->jupyter) (311)
Requirement already satisfied: six>=1.5 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from python-dateutil>=2.8.2->jupyter-client>=8.0.0->ipykernel->jupyter) (1.17.0)
Requirement already satisfied: widgetsnbextension~=4.0.14 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipywidgets->jupyter) (4.0.14)
Requirement already satisfied: jupyterlab_widgets~=3.0.15 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from ipywidgets->jupyter) (3.0.15)
Requirement already satisfied: async-lru>=1.0.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (2.0.5)
Requirement already satisfied: httpx<1,>=0.25.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (0.28.1)
Requirement already satisfied: jinja2>=3.0.3 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (3.1.6)
Requirement already satisfied: jupyter-lsp>=2.0.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (2.3.0)
Requirement already satisfied: jupyter-server<3,>=2.4.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (2.17.0)
Requirement already satisfied: jupyterlab-server<3,>=2.27.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (2.27.3)
Requirement already satisfied: notebook-shim>=0.2 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (0.2.4)
Requirement already satisfied: setuptools>=41.1.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab->jupyter) (80.9.0)
Requirement already satisfied: anyio in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from httpx<1,>=0.25.0->jupyterlab->jupyter) (4.11.0)
Requirement already satisfied: certifi in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from httpx<1,>=0.25.0->jupyterlab->jupyter) (2025.10.5)
Requirement already satisfied: httpcore==1.* in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from httpx<1,>=0.25.0->jupyterlab->jupyter) (1.0.9)
Requirement already satisfied: idna in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from httpx<1,>=0.25.0->jupyterlab->jupyter) (3.10)
Requirement already satisfied: h11>=0.16 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from httpcore==1.*->httpx<1,>=0.25.0->jupyterlab->jupyter) (0.16.0)
Requirement already satisfied: argon2-cffi>=21.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (25.1.0)
Requirement already satisfied: jupyter-events>=0.11.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (0.12.0)
Requirement already satisfied: jupyter-server-terminals>=0.4.4 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (0.5.3)
Requirement already satisfied: nbformat>=5.3.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (5.10.4)
Requirement already satisfied: prometheus-client>=0.9 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (0.23.1)
Requirement already satisfied: pywinpty>=2.0.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (3.0.2)
Requirement already satisfied: send2trash>=1.8.2 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (1.8.3)
Requirement already satisfied: terminado>=0.8.3 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (0.18.1)
Requirement already satisfied: websocket-client>=1.7 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (1.9.0)
Requirement already satisfied: babel>=2.10 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (2.17.0)
Requirement already satisfied: json5>=0.9.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (0.12.1)
Requirement already satisfied: jsonschema>=4.18.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (4.25.1)
Requirement already satisfied: requests>=2.31 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (2.32.5)
Requirement already satisfied: sniffio>=1.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from anyio->httpx<1,>=0.25.0->jupyterlab->jupyter) (1.3.1)
Requirement already satisfied: argon2-cffi-bindings in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from argon2-cffi>=21.1->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (25.1.0)
Requirement already satisfied: MarkupSafe>=2.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jinja2>=3.0.3->jupyterlab->jupyter) (3.0.3)
Requirement already satisfied: attrs>=22.2.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema>=4.18.0->jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (25.4.0)
Requirement already satisfied: jsonschema-specifications>=2023.03.6 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema>=4.18.0->jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (2025.9.1)
Requirement already satisfied: referencing>=0.28.4 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema>=4.18.0->jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (0.37.0)
Requirement already satisfied: rpds-py>=0.7.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema>=4.18.0->jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (0.27.1)
Requirement already satisfied: python-json-logger>=2.0.4 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (4.0.0)
Requirement already satisfied: pyyaml>=5.3 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (6.0.3)
Requirement already satisfied: rfc3339-validator in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (0.1.4)
Requirement already satisfied: rfc3986-validator>=0.1.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (0.1.1)
Requirement already satisfied: fqdn in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (1.5.1)
Requirement already satisfied: isoduration in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (20.11.0)
Requirement already satisfied: jsonpointer>1.13 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (3.0.0)
Requirement already satisfied: rfc3987-syntax>=1.1.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (1.1.0)
Requirement already satisfied: uri-template in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (1.3.0)
Requirement already satisfied: webcolors>=24.6.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (24.11.1)
Requirement already satisfied: beautifulsoup4 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from nbconvert->jupyter) (4.14.2)
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Requirement already satisfied: defusedxml in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from nbconvert->jupyter) (0.7.1)
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Requirement already satisfied: tinycss2<1.5,>=1.1.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from bleach[css]!=5.0.0->nbconvert->jupyter) (1.4.0)
Requirement already satisfied: fastjsonschema>=2.15 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from nbformat>=5.3.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (2.21.2)
Requirement already satisfied: charset_normalizer<4,>=2 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from requests>=2.31->jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (3.4.3)
Requirement already satisfied: urllib3<3,>=1.21.1 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from requests>=2.31->jupyterlab-server<3,>=2.27.1->jupyterlab->jupyter) (1.26.20)
Requirement already satisfied: lark>=1.2.2 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from rfc3987-syntax>=1.1.0->jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (1.3.0)
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Requirement already satisfied: pycparser in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from cffi>=2.0.0b1->argon2-cffi-bindings->argon2-cffi>=21.1->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (2.23)
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Requirement already satisfied: types-python-dateutil>=2.8.10 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from arrow>=0.15.0->isoduration->jsonschema[format-nongpl]>=4.18.0->jupyter-events>=0.11.0->jupyter-server<3,>=2.4.0->jupyterlab->jupyter) (2.9.0.20251008)
Requirement already satisfied: executing>=1.2.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from stack_data->ipython>=7.23.1->ipykernel->jupyter) (2.2.1)
Requirement already satisfied: asttokens>=2.1.0 in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from stack_data->ipython>=7.23.1->ipykernel->jupyter) (3.0.0)
Requirement already satisfied: pure-eval in c:\users\19250\appdata\local\programs\python\python314\lib\site-packages (from stack_data->ipython>=7.23.1->ipykernel->jupyter) (0.2.3)

krassowski · October 14, 2025, 7:38am

Can you try downgrading ipykernel to 6.x?

WordlessMeteor · October 14, 2025, 11:54am

I’m not allowed to downgrade it to 6.x.

WordlessMeteor · October 14, 2025, 11:55am

This is the output.

C:\Users\19250>pip install ipykernel==6
Collecting ipykernel==6
  Downloading ipykernel-6.0.0-py3-none-any.whl.metadata (2.0 kB)
WARNING: Ignoring version 6.0.0 of ipykernel since it has invalid metadata:
Requested ipykernel==6 from https://files.pythonhosted.org/packages/df/4c/7df6ac3670a22dca8106fdd2e1d85d226dd5862da20ab8146e3d5e3a0186/ipykernel-6.0.0-py3-none-any.whl has invalid metadata: Expected matching RIGHT_PARENTHESIS for LEFT_PARENTHESIS, after version specifier
    matplotlib-inline (<0.2.0appnope,>=0.1.0) ; platform_system == "Darwin"
                      ~~~~~~~~^
Please use pip<24.1 if you need to use this version.
ERROR: Ignored the following yanked versions: 6.0.0, 6.0.1, 6.18.0, 6.18.1, 6.18.2, 6.18.3, 6.19.0, 6.20.0, 6.21.0, 6.27.0
ERROR: Could not find a version that satisfies the requirement ipykernel==6 (from versions: 4.0.1, 4.0.2, 4.0.3, 4.1.0, 4.1.1, 4.2.0, 4.2.1, 4.2.2, 4.3.0, 4.3.1, 4.4.0, 4.4.1, 4.5.0, 4.5.1, 4.5.2, 4.6.0, 4.6.1, 4.7.0, 4.8.0, 4.8.1, 4.8.2, 4.9.0, 4.10.0, 4.10.1, 5.0.0b1, 5.0.0, 5.1.0, 5.1.1, 5.1.2, 5.1.3, 5.1.4, 5.2.0, 5.2.1, 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 5.4.0, 5.4.1, 5.4.2, 5.4.3, 5.5.0, 5.5.3, 5.5.4, 5.5.5, 5.5.6, 6.0.0a0, 6.0.0a1, 6.0.0a2, 6.0.0a3, 6.0.0a4, 6.0.0a5, 6.0.0a6, 6.0.0b0, 6.0.0rc0, 6.0.0rc1, 6.0.0rc2, 6.0.2, 6.0.3, 6.1.0, 6.2.0, 6.3.0, 6.3.1, 6.4.0, 6.4.1, 6.4.2, 6.5.0, 6.5.1, 6.6.0, 6.6.1, 6.7.0, 6.8.0, 6.9.0, 6.9.1, 6.9.2, 6.10.0, 6.11.0, 6.12.0, 6.12.1, 6.13.0, 6.13.1, 6.14.0, 6.15.0, 6.15.1, 6.15.2, 6.15.3, 6.16.0, 6.16.1, 6.16.2, 6.17.0, 6.17.1, 6.19.1, 6.19.2, 6.19.3, 6.19.4, 6.20.1, 6.20.2, 6.21.1, 6.21.2, 6.21.3, 6.22.0, 6.23.0, 6.23.1, 6.23.2, 6.23.3, 6.24.0, 6.25.0, 6.25.1, 6.25.2, 6.26.0, 6.27.1, 6.28.0, 6.29.0, 6.29.1, 6.29.2, 6.29.3, 6.29.4, 6.29.5, 6.30.0a0, 6.30.0, 6.30.1, 7.0.0a0, 7.0.0a1, 7.0.0a2, 7.0.0a3, 7.0.0)
ERROR: No matching distribution found for ipykernel==6

spookster · October 14, 2025, 12:33pm

I can confirm ipykernel not properly connecting with ipykernel 7 and Python 3.14 on Windows 11, it was also reported here@github.

Try pip install ipykernel==6.30.1

WordlessMeteor · October 14, 2025, 12:49pm

It worked! Thank you!

I thought installing a python library version is like installing a conda package, in which case I don’t need to specify the complete version. I just specified “ipykernel==6”. This is my mistake.

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