/opt/conda/envs/py37/bin/python: can't open file 'Demuxalot.py': [Errno 2] No such file or directory. I have tried modifying the script several times but all the time I get the same error.

It does seem that if I don't specify the "python", the debugger will actually start but without using the proper python env, so all imports will naturally fail. I am actually not sure which pythonenv ...

The newly approved Python Enhancement Proposal 751 gives Python a standard lock file format for specifying the dependencies of projects. Here’s the what, why, and when.