This is a special matrix-free version of SCS. See these papers for further details on matrix-free solvers.
Using matrix-free scs in Python
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
Matrix-free SCS can only be called via CVXPY.