A simple test for sending SCPI commands and s2p files from Python to a Rohde&Schwarz VNA. Main tools: PyVISA (https://pyvisa.readthedocs.io/en/latest/) and RsInstrument (https://pypi.org/project/RsInstrument/) We have used this code to test a Rohde&Schwarz VNA ZNH8 at the mmWave lab, University of St. Andrews, Scotland.