#!/usr/bin/env python3

address = "TCPIP::10.42.47.104::INSTR"

import pyvisa, sys, io
from PIL import Image

rm = pyvisa.ResourceManager()
instr = rm.open_resource(address)
instr.write('SCDP')
answer = instr.read_raw()
img = Image.open(io.BytesIO(answer))
sys.stdout.buffer.write(b"Content-type: image/png\n\n")
img.save(sys.stdout.buffer, 'png')