[Python] How to specify conda env in Python Debugger in VScode

Problem


When I want to debug a Python file and hit the button Python Debugger: Debug Python File or Debugin with JSON, it selects the default conda environment.

Workaround


To fix that, I manually open the terminal (created by the debugger), conda activate conda_name, and then ask to debug again, and it works. However, it is tedious.

Desired


So, I tried to automate the conda environment activation with launch.json, and tasks.json through "preLaunchTask". but it does not select the conda env specified. My attempt:

launch.json

{
"version": "0.2.0",
"configurations": [
{
"name": "Python Debugger: Current File",
"type": "debugpy",
"request": "launch",
"program": "${file}",
"console": "integratedTerminal", // internalConsole -> to prevent from printing
"cwd": "${fileDirname}", // "${workspaceFolder}/src", "${workspaceFolder}",
"purpose": [
"debug-in-terminal"
],
"justMyCode": false,
"subProcess": true,
"logToFile": true,
"pythonArgs": ["-Xfrozen_modules=off"],



"env": {
"CONDA_DEFAULT_ENV": "/mnt/data/mochinski/.conda/envs/sklearn",
},
"python": "/mnt/data/mochinski/.conda/envs/sklearn/bin/python",
"preLaunchTask": "activate-conda-env",
}
]
}


tasks.json:

{
"version": "2.0.0",
"tasks": [
{
"label": "activate-conda-env",
"type": "shell",
"command": "conda init && conda activate /mnt/data/mochinski/.conda/envs/sklearn",
"problemMatcher": []
}
]
}


Thanks!!

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