Conflict with pylance syntax highlighting and code completion

[Koowah]

Applies To

• Notebooks (.ipynb files)
• Interactive Window and/or Cell Scripts (.py files with #%% markers)

What happened?

Pylance syntax highlighting works at first before giving way to jupyter syntax highlighting after a few seconds (20/30) at which point code completion stops working aswell.
Any idea why this might be ? This started fairly recently.

Thanks for your help 😄

VS Code Version

Version: 1.81.0 (user setup) Commit: 6445d93c81ebe42c4cbd7a60712e0b17d9463e97 Date: 2023-08-02T12:37:13.485Z Electron: 22.3.18 ElectronBuildId: 22689846 Chromium: 108.0.5359.215 Node.js: 16.17.1 V8: 10.8.168.25-electron.0 OS: Windows_NT x64 10.0.19045

Jupyter Extension Version

v2023.7.1002162226

Jupyter logs

No response

Coding Language and Runtime Version

Python 3.11.4

Language Extension Version (if applicable)

v2023.14.0

Anaconda Version (if applicable)

23.5.2

Running Jupyter locally or remotely?

Local

[Koowah]

Please let me know if there are any type of logs I can provide to help with your task 😃

[debonte]

Can you please provide a log as described under "Filing an issue" in the troubleshooting guide?

You might be hitting #4685.

[Koowah]

Can you please provide a log as described under "Filing an issue" in the troubleshooting guide?

You might be hitting #4685.

@debonte
Hi Erik,
I think you hit the nail on the head, after playing with my notebook it appears to be #4685 .

Please find the logs attached : to obtain them i reloaded the dev window, ran all the notebook's cells, added one, ran it and deleted it. On deletion, the syntax highlighting did in fact stop working.

pylogs.txt

[debonte]

It's possible that this behavior was caused by #4733 which is fixed in our latest prerelease build, 2023.8.41

Could you please all to 2023.8.41 and see if your issues are resolved?

[debonte]

@Koowah, when you see this issue, if you add/delete/reorder a cell, do you see Pylance crash with an error similar to this?

2023-08-26 09:07:01.700 [info] Error: Debug Failure. False expression: Chained file path undefined doesn't match cellFilePaths c:\temp\temp\4685repro_3\test.ipynb:pylance-notebook-cell:W3sZmlsZQ==.py
    at _0x35bbe7 (c:\Users\erikd\.vscode-insiders\extensions\ms-python.vscode-pylance-2023.8.41\dist\server.bundle.js:1:1025282)
    at c:\Users\erikd\.vscode-insiders\extensions\ms-python.vscode-pylance-2023.8.41\dist\server.bundle.js:1:1032550
    at _0x114e49.<computed> (c:\Users\erikd\.vscode-insiders\extensions\ms-python.vscode-pylance-2023.8.41\dist\server.bundle.js:1:1032582)
    at _0x4600bc._onDidChangeNotebookDocumentAsync (c:\Users\erikd\.vscode-insiders\extensions\ms-python.vscode-pylance-2023.8.41\dist\server.bundle.js:1:1010710)

[Koowah]

@debonte Pylance works fine when adding or reordering cells. The issue only happens on cell deletion. There is however no error message in the output tab.

[debonte]

Pylance works fine when adding or reordering cells. The issue only happens on cell deletion. There is however no error message in the output tab.

I want to make sure we're talking about the same thing. It sounds like you're saying that syntax highlighting, etc stops working when you delete a cell. I'm asking if after that occurs, does adding/deleting/reordering a cell cause Pylance to crash.

I'm trying to determine if this is a duplicate of #4685. There are two stages to that bug. First you lose language server functionality (ex. hover, semantic highlighting) as you described above and then if you change the structure of a notebook, Pylance will crash with the Chained file path...doesn't match cellFilePaths error.

[Koowah]

@debonte Sorry I misunderstood. It does indeed cause pylance to crash ! Probably a duplicate of #4685 then 😄

[debonte]

Excellent, thanks for confirming! I'll resolve this issue as a duplicate. Keep an eye on #4685 for updates.