[Gnuplot-py-users] Terminal Options?

Is there any access to terminal options? I'm using Mac OS X, so I'd 
like to be able to modify the aqua window size, fonts, etc:

set terminal aqua {<n>} {title "<wintitle>"} {size <x> <y>} {fname 
"<fontface>"} {fsize <fontsize>}

Whenever I try to issue:

plotobj = Gnuplot.Gnuplot()
plotobj('set terminal aqua size 800 450 fname "ComputerModern" fsize 
16')

and plot something it doesn't seem to take. Where should I look?

Tom