Easy! You can get the package from either pip or conda-forge:
pip install access
conda install -c conda-forge access
The only dependencies are pandas and numpy. Geopandas will allow convenience functions for Euclidean distances, but is not required for core methods.
Note that the library is python 3 only.
You can also clone the master branch from github:
git clone firstname.lastname@example.org:pysal/access.git cd access/ python setup.py install