I needed to install the DAFT package for Python 2.7 for my Dockerised Jupyter Server. pip install daft in the terminal installed DAFT for the Python 3 environment. This is how to install for Python 2.7.

Open a terminal to the Jupyter container docker exec -it notebooks bash and list the Conda environments:

conda info -e

python2                  /opt/conda/envs/python2
root                  *  /opt/conda

Activate the Python 2.7 environment source activate python2, and pip install daft.

source activate python2
pip install daft

DAFT will now be available to Python 2.7.