install venv using pip code example

Example 1: create a venv

# Create the virtual environment.
python -m venv venv

# Activate the env.
venv\Scripts\activate.bat

Example 2: how to create a new virtualenv

to make a new virtualenv: 
virtualenv env_name

             to activate this virtual environment:
source env_name/bin/activate (on mac and linux)
source env_name/Scripts/activate (on windows)

Example 3: start virtualenv

source env/bin/activate

Example 4: python env

python3 -m venv tutorial-env
tutorial-env\Scripts\activate.bat (window)
source tutorial-env/bin/activate (linux)