pyvisa-py

import pyvisa # Initialize the Resource Manager with the PyVISA-py backend # This tells PyVISA to use the pure Python implementation. rm = pyvisa.ResourceManager('@py') # List available resources (instruments) # The output will vary based on connected and supported hardware/emulators resources = rm.list_resources() print(f"Available resources: {resources}") # Example of opening a (possibly simulated) instrument # This line might fail if no such resource exists or is not properly configured # For demonstration, we'll try to open a generic ASRL resource if available. # Replace 'ASRL1::INSTR' with an actual resource from your 'resources' list. if resources: try: # Choose the first resource or a known one, e.g., 'ASRL1::INSTR' # Ensure the chosen resource type has its optional dependencies installed (e.g., PySerial for ASRL) instrument_address = resources[0] # Fallback to a common dummy address if real ones aren't found, for demonstration if not instrument_address.startswith(('ASRL', 'USB', 'TCPIP', 'GPIB')): instrument_address = 'ASRL1::INSTR' # This will likely fail without PySerial/a real ASRL port inst = rm.open_resource(instrument_address) print(f"Successfully opened: {instrument_address}") # Example: Query instrument identification (standard SCPI command) # This will likely only work if you have a real instrument or a simulator running try: idn = inst.query('*IDN?') print(f"Instrument IDN: {idn.strip()}") except pyvisa.errors.VisaIOError as e: print(f"Could not query *IDN? on {instrument_address}: {e}") finally: inst.close() print(f"Closed {instrument_address}") except pyvisa.errors.VisaIOError as e: print(f"Could not open resource {instrument_address}: {e}") except IndexError: print("No resources found to open.") else: print("No resources found by PyVISA-py backend.")