1. Use the pip tool to install virtualenv

http://docs.python-guide.org/en/latest/dev/virtualenvs/

2. Create a virtual environment in an empty directory: 

virtualenv -p <path to python3 executable> <path to empty directory>

3. cd into the directory you just created a virtual environment in, and clone our GitHub repo

4. Activate the virtual environment 

source bin/activate

5. cd into the repository root directory, install all dependencies using pip

pip -r requirements.txt

6. All set!