class Window(QtGui.QWidget):
    def __init__(self):                              #Initial a Window frame
        super(Window, self).__init__()
        self.labels()                                #insert labels
        self.buttons()                               #insert buttons
        self.draglists()
        self.table()
.
.
.

    def table(self):
        table = QtGui.QTableWidget(self)
        table.setRowCount(20)
        table.setColumnCount(4)
        table.resize(450, 300)
        table.move(640, 100)
        horHeader = ['Date', 'Category', 'Item', 'Expense']
        table.setHorizontalHeaderLabels(horHeader)
    def savefile(self):
        filename = unicode(QtGui.QFileDialog.getSaveFileName(self, 'Save File', '', ".xls(*.xls)"))
        wbk = xlwt.Workbook()
        sheet = wbk.add_sheet("sheet", cell_overwrite_ok=True)
        self.add2(sheet)
        wbk.save(filename)

    def add2(self, sheet):
        for currentColumn in range(self.tableWidget.columnCount()):
            for currentRow in range(self.tableWidget.rowCount()):
                try:
                    teext = str(self.tableWidget.item(currentRow, currentColumn)).text()
                    sheet.write(currentRow, currentColumn, teext)
                except AttributeError:
                    pass

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    ex = Window()
    ex.setGeometry (50, 50, 1200, 600)
    ex.show()
    ex.setWindowTitle("Search Engine for Expense")
    sys.exit(app.exec_())