See the tutorial link.
Python dependencies are listed in a requirements-py.txt
file, including the library version numbers. You can replicate the environment your codebase needs by using virtualenv:
# This creates the virtual environment
cd $PROJECT-PATH
virtualenv ensemble-climate-projections
Then install the dependencies by referring to the requirements-py.txt:
# This installs the modules
pip install -r requirements-py.txt
# This activates the virtual environment
source ensemble-climate-projections/bin/activate