print get_exec_pars().source
if get_exec_pars().source == CommandSource.ui:
    msg = None
    start = 0
    end = 10.0
    steps = 10    
else:
    msg = None
    start = float(args[0])
    end  = float(args[1])
    steps  = int(args[2])    


print msg
r = lscan (out, sin, start, end, steps, 0.2)

