qrcode_reader
Install the virtualenv package for creating a virtual environment with command "sudo pip install virtualenv" Create the virtual environment with "virtualenv env_qrcode_reader" Activate the virtual environment "source env_qrcode_reader/bin/activate" To decativate the virtual environment and use your original Python environment, simply type "deactivate". Install reqirements.txt: sudo pip install -r requirements.txt check package with $ pip list Package Version