Python Create Virtual Environment Windows & Linux

 1. install your python exe or python version 

2. check python --version or py --version and keep that in mind to use it

windows

   python --version

   pip install virtualenv 

#here python --version says 3.9, then while creating Venv, use python or python3.9 which ever works

   python -m venv env3.9

   env3.9\Scripts\activate

   deactivate

linux

sudo apt install python3.9

sudo apt install python3.9-venv

python3.9 --version

python3.9 -m venv env3.9

source env3.9/bin/activate

deactivate