Installation Manager - Python3 is installed already but installer does not recognise it

[electrojit]

%23 Description of problem
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BEFORE SUBMITTING, PLEASE SEARCH FOR DUPLICATES IN

• https://github.com/platformio/platformio-vscode-ide/issues%3Fq=is%3Aissue

%23 Configuration

VSCode: 1.61.2
PIO IDE: v2.3.4
System: Linux, 5.11.0-38-generic, x64

%23 Exception

Error: Can not find Python Interpreter. Please install Python 3.6 or above manually
  at H.value (/home/alien/.vscode/extensions/platformio.platformio-ide-2.3.4/node_modules/platformio-node-helpers/dist/index.js:1:765899)
  at processTicksAndRejections (internal/process/task_queues.js:93:5)
  at async H.value (/home/alien/.vscode/extensions/platformio.platformio-ide-2.3.4/node_modules/platformio-node-helpers/dist/index.js:1:764349)
  at async t.default.install (/home/alien/.vscode/extensions/platformio.platformio-ide-2.3.4/dist/extension.js:1:6773)
  at async /home/alien/.vscode/extensions/platformio.platformio-ide-2.3.4/dist/extension.js:1:12776

[Slushee-a]

It spits out this error but what it actually has missing isn't python3.8. It is missing python3-venv, because for some reason it doesn't come with ubuntu (and it's different flavors). You just have to do sudo apt install python3-venv in your terminal and restart vs code. Try installing Platform IO again and it should suceed.

[ivankravets]

See the solution in #1774