def handleBrowseButton(self):
pth =os.path.normpath('E:')
filter = "TXT (*.txt)"
file_name = QtGui.QFileDialog()
file_name.setFileMode(3) # 3=existing files
names = file_name.getOpenFileNames(None, "Open files", pth, filter)
if not names:
  print "CANCELLED"
  return

l = self.dlg.findChild(listWidget)