python virtualenv specify version code example
Example 1: python env
python3 -m venv tutorial-env
tutorial-env\Scripts\activate.bat (window)
source tutorial-env/bin/activate (linux)
Example 2: virtualenv specify python version
virtualenv --python=/usr/bin/python2.6
Example 3: how to make a virtual environment in python
.\env\Scripts\activate
Example 4: start virtualenv with python version
python3 -m venv