python make environment code example

Example 1: python create environment variable

import os
os.environ['variable_name'] = 'variable_value'

Example 2: how to use virtual environment python

python3 -m venv env

Example 3: create new python environment

py -m venv env

Example 4: how virtual environment in python works

>>> import sys
>>> sys.prefix
'/System/Library/Frameworks/Python.framework/Versions/3.5'