Virtual environment on Windows

Get Python 3.8 from the Python website (executable installer for Windows). During installation, tick the box for "add Python 3.8 to PATH" and take note of the installation location.

Also choose "Disable path length limit" if prompted.

Check

Open a command prompt and run

python

>>> import sys
>>> print(sys.executable)

and make sure that the location of the Python executable is the same you noted down during the installation.

Virtual environment

Open a command prompt and run

python3.8 -m pip install virtualenv
python3.8 -m pip install virtualenvwrapper-win

(Close the command prompt and open a new one.)

mkvirtualenv kraken
python3.8 -m virtualenv kraken

After this the following commands should work

workon kraken
<... do some work in the environment ...>
deactivate

Also see

echo %WORKON_HOME%

to see, where the virtual environments are stored.

The batch file

%WORKON_HOME%\kraken\Scripts\activate.bat

can be edited to add new environment variables at its end:

set "TRACEP5_EXE_PATH=C:\TRACE-V50P5-Exe\Executables\trace-V50p5-windows-msvs2017-ivf-x86-Release.exe"
etc.