[Matplotlib-users] title when using subplot

I have a plot that is divided into four subplots.

pylab.figure()
pylab.subplot(221)
pylab.plot(a,b,"k-")
pylab.subplot(222)
pylab.plot(a,b,"k-")
pylab.subplot(223)
pylab.plot(a,b,"k-")
pylab.subplot(224)
pylab.plot(a,b,"k-")

I would like to add a title to the entire plot, but pylab.title() only
applies to the most recent subplot. I have tried

pylab.figure()
pylab.subplot(111)
pylab.title("Title Here")
pylab.subplot(221)
pylab.plot(a,b,"k-")
pylab.subplot(222)
pylab.plot(a,b,"k-")
pylab.subplot(223)
pylab.plot(a,b,"k-")
pylab.subplot(224)
pylab.plot(a,b,"k-")

but this does not work as I do not create a plot for
the subplot(111) instance. Is there some way of getting
the type of title I want easily?

Cheers
   Tommy