This is a special matrix-free version of SCS. See these papers for further details on matrix-free solvers.
To create the Python interface, the following lines of code should work:
cd <scs-directory>/python
python setup.py install
You may need sudo
privileges for a global installation.
After installing the scs interface, you must import the module with
import mat_free_scs
Matrix-free SCS can only be called via CVXPY.