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.

Qt Code: 
  1. import sys
  2. from PyQt4 import QtCore, QtGui
  3.  
  4. class MyFileProxyModel(QtGui.QFileSystemModel):
  5.  
  6.     def __init__(self):
  7.         super(MyFileProxyModel, self).__init__(None)
  8.         self.headers=['1','2','3','4']
  9.  
  10.     def headerData(self, column, orientation, role):
  11.         if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
  12.             return QtCore.QVariant(self.headers[column])
  13.  
  14.         return QtCore.QVariant()
  15.  
  16. class MyProxyFilter(QtGui.QSortFilterProxyModel):
  17.  
  18.     def __init__(self):
  19.         super(MyProxyFilter, self).__init__(None)
  20.  
  21.     def filterAcceptsRow(self, sourceRow, sourceParent):
  22.         return True
  23.  
  24. class MyMainWindow(QtGui.QWidget):
  25.  
  26.     def __init__(self):
  27.         super(MyMainWindow, self).__init__(None)
  28.  
  29.         vl = QtGui.QVBoxLayout()
  30.         tableView = QtGui.QTableView()
  31.         tableView.setSortingEnabled(True)
  32.  
  33.         vl.addWidget(tableView)
  34.         self.setLayout(vl)
  35.  
  36.         fileModel = MyFileProxyModel()
  37.  
  38.         rootModelIndex = fileModel.setRootPath(QtCore.QDir.currentPath())
  39.  
  40.         proxyFilter = MyProxyFilter()
  41.         proxyFilter.setSourceModel(fileModel)
  42.  
  43.         tableView.setModel(proxyFilter)
  44.         tableView.setRootIndex(proxyFilter.mapFromSource(rootModelIndex))
  45.  
  46. if __name__ == '__main__':
  47.     app = QtGui.QApplication(sys.argv)
  48.     win = MyMainWindow()
  49.     win.show()
  50.     app.exec_()
  51.     sys.exit()
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