First, install virtualenv / virtualenvwrapper:

python -m pip install virtualenv
python -m pip install virtualenvwrapper
export WORKON_HOME=$HOME/.virtualenvs
source /usr/local/bin/virtualenvwrapper.sh

If you add source /usr/local/bin/virtualenvwrapper.sh to your local bash file (~/.bash_profile on Mac, ~/.bashrc on Linux), virtualenvwrapper commands will be available to you whenever you open a new command prompt. You can then use the following commands to make those changes active.

Mac users: source ~/.bash_profile Linux users: source ~/.bashrc

Finally, activate the virtual environment for TensorPy:

mkvirtualenv tensorpy

If you ever need to leave your virtual environment, use the following command:

deactivate

You can always jump back in later:

workon tensorpy