[solved] QAbstractListModel - update data in table view

[s_z_p]

How to update/refresh a data when my app is running. Data in 'file.txt' is changing, how to display this changes ?
I don't want to shutdown and restart my app.

@ class StockListModel(QtCore.QAbstractListModel):

def __init__(self, stockdata = [], parent = None):
    QtCore.QAbstractListModel.__init__(self, parent)            
    self.__stockdata = stockdata            

def rowCount(self, parent):
    return len(self.__stockdata)

def data(self, index, role):        
    if role == QtCore.Qt.DisplayRole:
        row = index.row()
        value = self.__stockdata[row]

        return value

if name == 'main':
app = QtGui.QApplication(sys.argv)
app.setStyle("plastique")

tableView = QtGui.QTableView()      
tableView.show()

a = os.popen("cat /home/user/file.txt")
a = a.read()
time_variable = QtCore.QString("%s"%a)       # how to refresh when app is running ?

model = StockListModel([time_variable])

tableView.setModel(model)
sys.exit(app.exec_())@