activate virtual environment in python code example

Example 1: python virtual environment

python3 -m venv env
python -m virtualenv env #py2

source env/bin/activate

#all this is on same directory

Example 2: create a virtualenv python

pip install virtualenv
cd projectfolder #go to project folder
virtualenv projectname #create the folder projectname 
source projectname/bin/activate

Example 3: how to use virtual environment python

python3 -m pip install --user virtualenv

Example 4: python virtual environment

source env/bin/activate

Example 5: activate environment python

$ source env/bin/activate
(env) $

Example 6: python virtual env

$ source venv/bin/activate