PyQt: QTableWidget to .xls file

So, I have a QTableWidget that I want to save it to an .xls file using the xlwt module...

Here's the code:

def savefile(self):
        filename = unicode(QtGui.QFileDialog.getSaveFileName(self, 'Save File', '', ".xls(*.xls)"))    
        wbk = xlwt.Workbook()
        self.sheet = wbk.add_sheet("sheet")
        self.row = 0
        self.col = 0
        self.add2(self.row, self.col)
        wbk.save(filename)    


def add2(self, row, col):
    for i in range(self.tableWidget.columnCount()):
        for x in range(self.tableWidget.rowCount()):
            try:
                teext = str(self.tableWidget.item(row, col).text())
                self.sheet.write(row, col, teext)
                row += 1
            except AttributeError:
                pass                   
        col += 1

But that writes out only the text from cell 0,0 and nothing else...

I think that I have made some serious mistake...

Update:

def savefile(self):
        filename = unicode(QtGui.QFileDialog.getSaveFileName(self, 'Save File', '', ".xls(*.xls)"))    
        wbk = xlwt.Workbook()
        self.sheet = wbk.add_sheet("sheet", cell_overwrite_ok=True)
        self.add2()
        wbk.save(filename)    


def add2(self):
    row = 0
    col = 0         
    for i in range(self.tableWidget.columnCount()):
        for x in range(self.tableWidget.rowCount()):
            try:             
                teext = str(self.tableWidget.item(row, col).text())
                self.sheet.write(row, col, teext)
                row += 1
            except AttributeError:
                row += 1
        row = 0
        col += 1             

Solved the problem...