[Gnuplot-py-users] Suppress visual plot, but still save hardcopy

I'm generating thousands of plots, which I'm storing as ps files as
records of different trials.  For example:

#plot my data
g2.plot(r22, r2, r21)

#save results of a trial
g2.hardcopy(trial+'/result.ps', enhanced=1, color=1)

What I would like to do is complete the plot in g2, but suppress the
visual output and just save a hardcopy to view later if need be.
Eventually, as expected, AquaTerm will crash as I keep displaying the
numerous plots.  Is there a way to implement this?

I'm running OSX (10.4.8), X11 and AquaTerm, but I'm assuming the
method or arguments, if they exist, are universal.

Thank you,
Conor