no module named debugpy

Has anyone managed to debug (DAP) python with a virtual environment activated?

reddit.com › r › emacs › comments › 18ao16x › has_anyone_managed_to_debug_dap_python_with_a

You mean that dap exited abnormally? If yes, check the stderr buffer for the debug process. Answer from yyoncho on reddit.com

GitHub

github.com › microsoft › debugpy › issues › 1148

ModuleNotFoundError: No module named 'debugpy' · Issue #1148 · microsoft/debugpy

December 9, 2022 - Debugging Flask apps throws a ModuleNotFoundError, even with a minimal application. This happens both when I use the built-in debugger config, or create my own via launch.json. The terminal output is: /usr/bin/env /usr/local/bin/python /home/vscode/.vscode-server/extensions/ms-python.python-2022.20.0/pythonFiles/lib/python/debugpy/adapter/../../debugpy/launcher 56505 -- /workspaces/debug-repro-folder/main.py * Serving Flask app 'main' * Debug mode: on WARNING: This is a development server.

Author korompaiistvan

Stack Overflow

stackoverflow.com › questions › 75531326 › vscode-changing-python-interpreter-leads-to-no-module-named-debugpy

vscode changing python interpreter leads to no module named debugpy - Stack Overflow

Thank you Jiale, I was aware of ... 2023-02-23T10:08:03Z+00:00 ... Sorry you didn't make that clear in your question. Try installing debugpy for your interpreter....

reddit.com › r/neovim › "error while finding module specification for 'debugpy.adapter' (modulenotfounderror: no module named 'debugpy')" when debugging python in neovim

r/neovim on Reddit: "Error while finding module specification for 'debugpy.adapter' (ModuleNotFoundError: No module named 'debugpy')" when debugging python in neovim

March 22, 2025 -

Hi,

This is my neovim config for dap. This is specifically python config.

When I tried to debug a python file I get below error.

Dap Error

JS/Java/scala and go are all working fine. Only python dap is giving error.

Dap Error log is

/opt/homebrew/opt/python@3.13/bin/python3.13: Error while finding module specification for 'debugpy.adapter' (ModuleNotFoundError: No module named 'debugpy')

I have venv environment as well but still getting same error.

Any idea how can I fix this error?

Top answer

1 of 3

The error is telling you it can't find debugpy, you need to install debugpy and the interpreter you're using needs to be able to load it

2 of 3

Just adding this comment even though the post is old, because hopefully it will help other people solve this. There are a couple of things that could be happening here. nvim might have been launched without first activating venv. Or, the debugpy module, which is a python library, isn't installed in whatever python environment your nvim instance is running in. Since venv is really popular with python, using mason to install it doesn't really make sense, because mason will install it in the system-wide python environment. You need to individually pip install debugpy in every venv you plan on using it with. It could also confuse some folks if they don't realize that debugpy is a python library.

PyPI

pypi.org › project › debugpy

debugpy · PyPI

Details for the file debugpy-1.8.20-py2.py3-none-any.whl. ... See more details on using hashes here. Details for the file debugpy-1.8.20-cp314-cp314-win_amd64.whl. Download URL: debugpy-1.8.20-cp314-cp314-win_amd64.whl ... See more details on using hashes here. Details for the file debugpy-1.8.20-cp314-cp314-win32.whl. Download URL: debugpy-1.8.20-cp314-cp314-win32.whl ... See more details on using hashes here. Details for the file debugpy-1.8.20-cp314-cp314-manylinux_2_34_x86_64.whl.

      » pip install debugpy

Published Jan 29, 2026

Version 1.8.20

Repository https://github.com/microsoft/debugpy

Homepage https://aka.ms/debugpy

GitHub

github.com › aws › aws-toolkit-vscode › issues › 3075

Debug locally: "ImportError: No module named debugpy" · Issue #3075 · aws/aws-toolkit-vscode

December 30, 2022 - I performed some tests, the aws_toolkit.log main problem is not finding the debugpy module, but it is attached.

Author marciogoulart

Stack Overflow

stackoverflow.com › questions › 68679558 › why-are-python-modules-not-found-despite-installing-them-in-pip

linux - Why are python modules not found despite installing them in pip? - Stack Overflow

python -m pip install debugpy /usr/bin/python: No module named pip

reddit.com › r/emacs › has anyone managed to debug (dap) python with a virtual environment activated?

r/emacs on Reddit: Has anyone managed to debug (DAP) python with a virtual environment activated?

December 4, 2023 -

I can't seem to get a virtual environment to work with the dap-debug . I've tried running pyvenv-actviate (pyvenv), but it "exited abnormally".

SOLVED: You need to install debugpy (source /venv/bin/activate && pip install debupy) inside the virtual environment.

Top answer

1 of 3

You mean that dap exited abnormally? If yes, check the stderr buffer for the debug process.

2 of 3

I think gdb itself added DAP support awhile ago, so in theory you could use generic gdb modes (like M-x debug iirc) and do it that way; I've not tried it yet though.

GitHub

github.com › microsoft › debugpy

GitHub - microsoft/debugpy: An implementation of the Debug Adapter Protocol for Python · GitHub

At the beginning of your script, import debugpy, and call debugpy.listen() to start the debug adapter, passing a (host, port) tuple as the first argument.

Starred by 2.4K users

Forked by 191 users

GitHub

github.com › microsoft › debugpy › issues › 506

Debugging fails to start when Visual Studio Code Remote automatically forwards ports from a GitHub Codespace · Issue #506 · microsoft/debugpy

December 20, 2020 - Environment data debugpy version: Not sure, whatever is included in the VS Code Python extension, v2020.12.424452561 (run import debugpy; print(debugpy.__version__) if uncertain) [this didn't work, I get ModuleNotFoundError: No module na...

Author jarrodldavis

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GitHub

github.com › microsoft › debugpy › issues › 811

Fail to run debugpy using vscode with flask, "No module named" error message · Issue #811 · microsoft/debugpy

December 21, 2021 - import debugpy debugpy.listen(("localhost", 5050)) print("VS Code debugger can now be attached, press F5 in VS Code", flush=True) debugpy.wait_for_client() print("VS Code debugger attached, enjoy debugging", flush=True) ... # launch.json "version": "0.2.0", "configurations": [ { "name": "Python: Remote Attach", "type": "python", "request": "attach", "connect": { "host": "localhost", "port": 5050 }, "pathMappings": [{ "localRoot": "${workspaceFolder}", "remoteRoot": "." }] }, ] }

Author pancudaniel7

GitHub

github.com › microsoft › debugpy › issues › 658

Can't debug Poetry module, getting "No module named Poetry" when running with minimal debug configuration · Issue #658 · microsoft/debugpy

July 8, 2021 - $ cd /Users/juliant/GitLocal/Work/mince ; /usr/bin/env /Users/juliant/Library/Caches/pypoetry/virtualenvs/mince-4ZV0U0mz-py3.9/bin/python /Users/juliant/.vscode/extensions/ms-python.python-2021.6.944021595/pythonFiles/lib/python/debugpy/launcher 56767 -- -m poetry run mince Alias tip: cdg ; /usr/bin/env /Users/juliant/Library/Caches/pypoetry/virtualenvs/mince-4ZV0U0mz-py3.9/bin/python /Users/juliant/.vscode/extensions/ms-python.python-2021.6.944021595/pythonFiles/lib/python/debugpy/launcher 56767 -- -m poetry run mince /Users/juliant/Library/Caches/pypoetry/virtualenvs/mince-4ZV0U0mz-py3.9/bin/python: No module named poetry

Author macintacos

Stack Overflow

stackoverflow.com › questions › 79526957 › error-to-find-module-debugpy-when-debugging-python

neovim - Error to find module debugpy when debugging Python - Stack Overflow

Downgrading the Python extension to v2022.18.2 fixes the problem Reference: github.com/microsoft/debugpy/issues/1148 ... what does python3 -m pip freeze prints? Do you have this module installed? (in python env which is being used by dap?) ... Find the answer to your question by asking. Ask question ... See similar questions with these tags. ... Domain expertise still wanted: the latest trends in AI-assisted knowledge for... ... I’m Jody, the Chief Product and Technology Officer at Stack Overflow. Let’s... PubChem Service no longer supports a list of CompoundID specifications

Stack Overflow

stackoverflow.com › questions › 53323647 › vscode-python-debug-no-module-named-xx-when-using-module-attribute

debugging - VSCode python debug: "No module named xx" when using module attribute - Stack Overflow

Top answer

1 of 4

You can try the following:

{
    "name": "Python: A name example",
    "type": "python",
    "request": "launch",
    "program": "practice1/my_module.py",
    "env": {
        "PYTHONPATH": "${workspaceFolder}"
    },
}

Using program instead of module is almost the same.
You need to solve the imports as if you had the package installed. Therfore you need to add a PYTHONPATH.

2 of 4

I have ran into the same issue. You may have two Python interpreters installed and only one has the modules you need. Try selecting another Python version by running from the command pallet (Ctl+Shift+p) then python: Select Interpreter and choose where your python lives. I had:

/usr/bin/python3
/usr/local/bin/python

RoseIndia

roseindia.net › answers › viewqa › pythonquestions › 71787-ModuleNotFoundError-No-module-named-debugpy.html

ModuleNotFoundError: No module named 'debugpy'

September 9, 2020 - After the installation of debugpy python library, ModuleNotFoundError: No module named 'debugpy' error will be solved.

GitHub

github.com › microsoft › debugpy › issues › 540

Module import error only when debugging · Issue #540 · microsoft/debugpy

February 4, 2021 - debugpy version: Unknown. import debugpy; print(debugpy.__version__) results in 'no module named debugpy'. When debugging through VS Code, shows (\.vscode\extensions\ms-python.python-2021.1.502429796\pythonFiles\lib\python\debugpy\launcher')

Author chrissyast

Stack Overflow

stackoverflow.com › questions › 79526957 › error-while-finding-module-specification-for-debugpy-adapter-modulenotfounde

"Error while finding module specification for 'debugpy.adapter' (ModuleNotFoundError: No module named 'debugpy')" when debugging python in neovim - Stack Overflow

/opt/homebrew/opt/[email protected]/bin/python3.13: Error while finding module specification for 'debugpy.adapter' (ModuleNotFoundError: No module named 'debugpy')

Stack Overflow

stackoverflow.com › questions › 75956116 › subprocess-with-visual-studio-debugger-attached-to-process-causes-a-problem-in-p

Subprocess with visual studio debugger attached to process causes a problem in python project - Stack Overflow

0.47s - Error importing debugpy._vendored.force_pydevd (with sys.path entry: 'c:\program > files\microsoft visual studio\2022\professional\common7\ide\extensions\microsoft\python\core') Traceback (most recent call last): File "c:\program files\microsoft visual studio\2022\professional\common7\ide\extensions\microsoft\python\core\debugpy_vendored\pyde> vd_pydevd_bundle\pydevd_defaults.py", line 60, in on_pydb_init import(module_name) ModuleNotFoundError: No module named 'debugpy'

Jupyter Community Forum

discourse.jupyter.org › general

I can't get past this part, can anyone help me? - General - Jupyter Community Forum

December 8, 2022 - Restarting with stat 0.07s - Debugger warning: It seems that frozen modules are being used, which may 0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off 0.00s - to python to disable frozen modules. 0.00s - Note: Debugging will proceed.

GitHub

github.com › microsoft › debugpy › issues › 1997

Unable to run a Python module in a subprocess when `subProcess: true` · Issue #1997 · microsoft/debugpy

February 23, 2026 - bash-3.2$ cd /Users/pete/projects/subprocess_test ; /usr/bin/env /Users/pete/projects/subprocess_test/.venv/bin/python /Users/pete/.vscode/extensions/ms-python.debugpy-2025.18.0-darwin-arm64/bundled/libs/debugpy/adapter/../../debugpy/launcher 56894 -- /Users/pete/projects/subprocess_test/main.py No module named sub

Author anvilpete

JetBrains

youtrack.jetbrains.com › issue › PY-43911 › run-my-python-code-works-but-debugging-has-problems-ModuleNotFoundError-No-module-named-MaryPackage

run my python code works, but debugging has problems

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