import nidaqmx
import sys

task = nidaqmx.Task()
task.do_channels.add_do_chan("cDAQ1Mod3/port0/line2",
                                line_grouping=nidaqmx.constants.LineGrouping.CHAN_PER_LINE)
task.start()

if int(sys.argv[1]) == 0:
    task.write(False)
elif int(sys.argv[1]) == 1:
    task.write(True)

task.stop()
task.close()