Example for Siglent SPD4000 devices

siglent_spd.py

#! /usr/bin/env python3
import pyvisa as visa
from serial.serialutil import SerialException


def main():
    # Get list of connected devices
    rm = visa.ResourceManager()
    device_list = {}
    for device_name in rm.list_resources():
        print(device_name)
        device_id = ""
        try:
            device_id = rm.open_resource(device_name).query("*IDN?")
        except (visa.VisaIOError, FileNotFoundError, SerialException):
            pass
        if "spd" in device_name.lower(): # Add only devices which names contain "spd"
            if device_name not in device_list:
                device_list[device_name] = rm.open_resource(device_name)

    for name in device_list.keys():
        device = device_list[name]
        print(name.split("::")[3])
        device.write(":SOURce:VOLTage:SET CH1,3")
        current_voltage = device.query(':SOURce:VOLTage:SET? CH1')
        print(f"Current voltage: {current_voltage}")
        # Enable output
        device.write("OUTPut CH1,1")


if __name__ == "__main__":
    main()