if [ ! -e venv ]; then
    virtualenv -p python3.6.9 venv
fi
. venv/bin/activate

pip install scikit-image==0.16.2
pip install scipy==1.1.0
pip install Pillow==7.0.0
pip install tensorflow==1.14.0
pip install Keras==2.0.8
pip install opencv-python==4.2.0.32

# OR 
# pip install -r requirements.txt