[PyQt] using pickle to save contents of QSortFilterProxyModel

[James Polk]

Hi,..I'm trying to save the contents of a QSortFilterProxyModel
(self.proxyModel) as a pickle format file.
The code below appears to work, but unfortunately, there's
nothing in the file....zero size file..

 def saveAsPickle(self):
     fname = "C:/tmp/pick.dat"
     file = open(unicode(fname), "w")
     newModel = self.proxyModel
     pickle.dump(newModel, file)

So, I decided to take step back and save the file as simple text,
and that works fine...so I know the data in self.proxyModel is
good and is there...

After several hours of tinkering and research,...I'm a bit stumped.
I read somewhere...that the statement
    newmodel = self.proxyModel
was necessary,...or advised,..though I'm not totally clear why..

Would it have something to do with the presence of an item in
the database stored as

QtCore.QDateTime(QtCore.QDate(2010,11,2)),

...which is also printed/saved out as that in the simple text save
function...All other data in the model are simple strings...at least
as of yet,...plan is to add an image/icon in there somewhere..

Although there seem to be a lot of examples out there that 
deal with basic use of pickle,..I haven't found any dealing with
QSortFilterProxyModel....and/or   QTable-, QTree-, QListView...
Is there another preferred way of saving data from these three
elements?

This is the class/init part at the top

class Window(QtGui.QWidget):
    def __init__(self):
        super(Window, self).__init__()

        self.proxyModel = QtGui.QSortFilterProxyModel()
        etc
        etc

Any help or advice would be greatly appreciated,..




      
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