QFileSystemModel and QSortFilterProxyModel problem

I'm trying to filter QFileSystemModel using QSortFilterProxyModel. But when I'm trying to do this my tableView doesn't show anything. Everything works correctly without using filter.

Code:

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import sys
from PyQt4 import QtCore, QtGui
 
class MyFileProxyModel(QtGui.QFileSystemModel):
 
    def __init__(self):
        super(MyFileProxyModel, self).__init__(None)
        self.headers=['1','2','3','4']
 
    def headerData(self, column, orientation, role):
        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
            return QtCore.QVariant(self.headers[column])
 
        return QtCore.QVariant()
 
class MyProxyFilter(QtGui.QSortFilterProxyModel):
 
    def __init__(self):
        super(MyProxyFilter, self).__init__(None)
 
    def filterAcceptsRow(self, sourceRow, sourceParent):
        return True
 
class MyMainWindow(QtGui.QWidget):
 
    def __init__(self):
        super(MyMainWindow, self).__init__(None)
 
        vl = QtGui.QVBoxLayout()
        tableView = QtGui.QTableView()
        tableView.setSortingEnabled(True)
 
        vl.addWidget(tableView)
        self.setLayout(vl)
 
        fileModel = MyFileProxyModel()
 
        rootModelIndex = fileModel.setRootPath(QtCore.QDir.currentPath())
 
        proxyFilter = MyProxyFilter()
        proxyFilter.setSourceModel(fileModel)
 
        tableView.setModel(proxyFilter)
        tableView.setRootIndex(proxyFilter.mapFromSource(rootModelIndex))
 
if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    win = MyMainWindow()
    win.show()
    app.exec_()
    sys.exit()

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