Python

 pip3 install -U --timeout 10000 scikit-learn ## timeout in seconds

python3 -m pip install --user --upgrade pip
python3 -m pip --version
python3 -m venv zenv
. zenv/bin/activate

pip install opencv-python
pip install scipy
pip install trimesh
pip install imageio tensorboardX pandas matplotlib
pip install -r requirements.txt

deactivate

python 2.7

 sudo apt-get install python2.7-dev
 sudo apt install python-pip
 pip2 install virtualenv  
 python2.7 -m virtualenv zenv
 . zenv/bin/activate