Linting issues duplicated in PROBLEMS panel with pre-release version 2024.23.2025012801 of ms-python.python extension

[cmelaro]

Type: Bug

Behaviour

Linting issues duplicated in PROBLEMS panel with pre-relase version 2024.23.2025012801 of ms-python.python extension.

Steps to reproduce:

1. Install pre-release version 2024.23.2025012801 of ms-python.python extension.
2. Install version of the ms-python.pylint and/or ms-python.flake8 extenstions. (I've tried both release and pre-release versions and both exhibit problem.)
3. Enter any code in editor pane that produces linting issues and observe those issue reported multiple times in the PROBLEMS panel.

Diagnostic data

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

2025-02-05 07:58:18.620 [info] Telemetry level is off
2025-02-05 07:58:18.620 [info] Experiments are disabled, only manually opted experiments are active.
2025-02-05 07:58:18.620 [info] Native locator: Refresh started
2025-02-05 07:58:18.620 [info] Native locator: Refresh started
2025-02-05 07:58:18.630 [info] > pyenv which python
2025-02-05 07:58:18.630 [info] cwd: .
2025-02-05 07:58:18.651 [info] > conda info --json
2025-02-05 07:58:18.658 [info] > python -c "import sys;print(sys.executable)"
2025-02-05 07:58:18.705 [info] Native locator: Refresh finished in 1271 ms
2025-02-05 07:58:18.706 [info] > pyenv which python
2025-02-05 07:58:18.706 [info] cwd: .
2025-02-05 07:58:19.553 [info] Starting Pylance language server.
2025-02-05 07:59:02.627 [info] Discover tests for workspace name: vscode_python_extenstion_issue - uri: /Users/cmelaro/vscode_python_extenstion_issue/test.py
2025-02-05 07:59:32.739 [info] Discover tests for workspace name: vscode_python_extenstion_issue - uri: /Users/cmelaro/vscode_python_extenstion_issue/test.py
2025-02-05 08:00:04.370 [info] Discover tests for workspace name: vscode_python_extenstion_issue - uri: /Users/cmelaro/vscode_python_extenstion_issue/test.py
2025-02-05 08:00:26.803 [info] Discover tests for workspace name: vscode_python_extenstion_issue - uri: /Users/cmelaro/vscode_python_extenstion_issue/.vscode/settings.json
2025-02-05 08:00:31.684 [info] Discover tests for workspace name: vscode_python_extenstion_issue - uri: /Users/cmelaro/vscode_python_extenstion_issue/.vscode/settings.json
2025-02-05 08:00:40.990 [info] Discover tests for workspace name: vscode_python_extenstion_issue - uri: /Users/cmelaro/vscode_python_extenstion_issue
2025-02-05 08:00:45.999 [info] Discover tests for workspace name: vscode_python_extenstion_issue - uri: /Users/cmelaro/vscode_python_extenstion_issu

Extension version: 2024.23.2025012801
VS Code version: Code 1.96.4 (cd4ee3b1c348a13bafd8f9ad8060705f6d4b9cba, 2025-01-16T00:16:19.038Z)
OS version: Darwin arm64 24.3.0
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.13.1.final.0
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): System
• Value of the python.languageServer setting: Pylance

User Settings

languageServer: "Pylance"

Installed Extensions

Extension Name	Extension Id	Version
autodocstring	njp	0.6.1
autopep8	ms-	2024.0.0
black-formatter	ms-	2024.4.0
Bookmarks	ale	13.5.0
code-runner	for	0.12.2
code-spell-checker	str	4.0.34
codespaces	Git	1.17.3
copilot	Git	1.264.0
copilot-chat	Git	0.23.2
datawrangler	ms-	1.16.0
debugpy	ms-	2024.15.2025012801
even-better-toml	tam	0.21.2
flake8	ms-	2023.10.0
gc-excelviewer	Gra	4.2.62
git-graph	mhu	1.30.0
githistory	don	0.6.20
gitlens	eam	16.2.1
hexeditor	ms-	1.11.1
indent-rainbow	ode	8.3.1
intellicode-api-usage-examples	Vis	0.2.9
isort	ms-	2023.10.1
jq-syntax-highlighting	jq-	0.0.2
js-debug	ms-	1.96.0
js-debug-companion	ms-	1.1.3
jsonpath-extract	dav	1.2.3
jupyter	ms-	2024.11.0
jupyter-keymap	ms-	1.1.2
jupyter-renderers	ms-	1.1.0
markdown-all-in-one	yzh	3.6.2
material-icon-theme	PKi	5.19.0
open-in-browser	tec	2.0.0
pdf	tom	1.2.2
project-manager	ale	12.8.0
pylint	ms-	2024.0.0
python	ms-	2024.23.2025012801
rainbow-csv	mec	3.16.0
remote-containers	ms-	0.394.0
remote-explorer	ms-	0.4.3
remote-repositories	ms-	0.42.0
remote-server	ms-	1.5.2
remote-ssh	ms-	0.116.1
remote-ssh-edit	ms-	0.87.0
remotehub	Git	0.64.0
ruff	cha	2025.4.0
sort-lines	Tyr	1.12.0
sqltools	mtx	0.28.3
sqltools-driver-pg	mtx	0.5.4
sqltools-driver-sqlite	mtx	0.5.1
terraform	has	2.34.3
todo-tree	Gru	0.0.226
vsc-python-indent	Kev	1.19.0
vscode-docker	ms-	1.29.4
vscode-edit-csv	jan	0.11.2
vscode-eslint	dba	3.0.10
vscode-github-actions	git	0.27.1
vscode-jq	dan	1.2.0
vscode-jq-playground	dav	4.3.5
vscode-js-profile-table	ms-	1.0.10
vscode-json-path	wei	2.4.0
vscode-jupyter-cell-tags	ms-	0.1.9
vscode-jupyter-slideshow	ms-	0.1.6
vscode-kubernetes-tools	ms-	1.3.20
vscode-markdownlint	Dav	0.58.2
vscode-open-in-github	ziy	1.3.6
vscode-opennewinstance	chr	0.0.15
vscode-pull-request-github	Git	0.102.0
vscode-pylance	ms-	2024.12.1
vscode-python-envs	ms-	0.1.2025013001
vscode-remote-extensionpack	ms-	0.26.0
vscode-xml	red	0.27.2
vscode-yaml	red	1.15.0
vscodeintellicode	Vis	1.3.2

[cmelaro]

Screenshot showing issue...

Note that switching back to the release version of the Python extension (2024.22.2) and restarting extensions makes this issue go away and each problem is shown only once.

[karthiknadig]

You can turn on detailed logs by adding this to your user settings, and share the logs from Output> flake8 or Output> pylint

    "flake8.trace.server": "verbose",
    "pylint.trace.server": "verbose",

That should provide the logs that we need to file a report on VS Code.

The extensions themselves haven been changed to cause such duplication.

[cmelaro]

Here are the verbose logs for both pylint and flake8...

Flake8.log
Pylint.log

[karthiknadig]

From the logs, we report the issues only once, per update. This should be handled in VS Code.

2025-02-05 13:49:19.082 [info] [Trace - 1:49:19 PM] Received notification 'textDocument/publishDiagnostics'.
2025-02-05 13:49:19.082 [info] Params: {
    "uri": "file:///c%3A/GIT/misc/vscode-python-environments/build/update_ext_version.py",
    "diagnostics": [
        {
            "range": {
                "start": {
                    "line": 17,
                    "character": 0
                },
                "end": {
                    "line": 17,
                    "character": 0
                }
            },
            "message": "Line too long (121/100)",
            "severity": 3,
            "code": "C0301:line-too-long",
            "codeDescription": {
                "href": "https://pylint.readthedocs.io/en/latest/user_guide/messages/convention/line-too-long.html"
            },
            "source": "Pylint"
        },
        {
            "range": {
                "start": {
                    "line": 0,
                    "character": 0
                },
                "end": {
                    "line": 0,
                    "character": 0
                }
            },
            "message": "Missing module docstring",
            "severity": 3,
            "code": "C0114:missing-module-docstring",
            "codeDescription": {
                "href": "https://pylint.readthedocs.io/en/latest/user_guide/messages/convention/missing-module-docstring.html"
            },
            "source": "Pylint"
        },
        {
            "range": {
                "start": {
                    "line": 63,
                    "character": 0
                },
                "end": {
                    "line": 63,
                    "character": 8
                }
            },
            "message": "Missing function or method docstring",
            "severity": 3,
            "code": "C0116:missing-function-docstring",
            "codeDescription": {
                "href": "https://pylint.readthedocs.io/en/latest/user_guide/messages/convention/missing-function-docstring.html"
            },
            "source": "Pylint"
        },
        {
            "range": {
                "start": {
                    "line": 71,
                    "character": 4
                },
                "end": {
                    "line": 78,
                    "character": 9
                }
            },
            "message": "Unnecessary \"elif\" after \"raise\", remove the leading \"el\" from \"elif\"",
            "severity": 4,
            "code": "R1720:no-else-raise",
            "codeDescription": {
                "href": "https://pylint.readthedocs.io/en/latest/user_guide/messages/refactor/no-else-raise.html"
            },
            "source": "Pylint"
        }
    ]
}


2025-02-05 13:49:54.987 [info] [Trace - 1:49:54 PM] Sending notification 'textDocument/didClose'.
2025-02-05 13:49:54.987 [info] Params: {
    "textDocument": {
        "uri": "file:///c%3A/GIT/misc/vscode-python-environments/build/update_ext_version.py"
    }
}


2025-02-05 13:49:54.994 [info] [Trace - 1:49:54 PM] Received notification 'textDocument/publishDiagnostics'.
2025-02-05 13:49:54.995 [info] Params: {
    "uri": "file:///c%3A/GIT/misc/vscode-python-environments/build/update_ext_version.py",
    "diagnostics": []
}

[karthiknadig]

@cmelaro Does uninstalling the ms-python.vscode-python-envs extension fix the problem for you? It seems like that extension is somehow causing this, in my case.

[karthiknadig]

Thanks for reporting this, it looks like there was a bug in two different places that caused this. Part of the issue was that we generated more than one event for interpreter change. Normally, that would be fine, but in this case it caused the pylint/flake8 extensions to start two separate servers.

I will provide a fix for those as well.

[cmelaro]

@cmelaro Does uninstalling the ms-python.vscode-python-envs extension fix the problem for you? It seems like that extension is somehow causing this, in my case.

@karthiknadig Yes I was able to confirm that removing the ms-python.vscode-python-envs extension does make the problem go away.