save hashtable to .npz file

[kiriace]

i have installed redis successfully and on
providing the argument
storage_config={"redis": {"host": 'localhost', "port": 6379}},matrices_filename="/home/username/filename.npz"
where filename.npz has not been created nor is hashtable stored on redis ..
the program and query runs successfully giving the output vector but doesn't save a new .npz file or save the hashtables