No marker fill?

Hi all,

    > I would like a way to set the marker face color to 'None'
    > so that I may see overlapping markers. I am aware of the
    > workaround using scatter() to set alpha, but alas that's
    > no good for PS output:


    > Is this currently possible, or on the dev. radar? If
    > not, I'll file an official feature request.

You should be able to set the markerfacecolor property to 'None' the
string, as opposed to None, the python null object. This is a bit
ugly, but None is used in the matplotlib properties to mean "do the
default, ie the rc setting". If

  plot(x, y, 'o', markerfacecolor='None')

fails, please post a complete example and we'll look into it.