def append_row(self, cols, element_id=None):
rowCount = self.list.rowCount()
self.list.insertRow(rowCount)
for index, value in enumerate(cols):
col = QTableWidgetItem(value)
col.element_id = element_id
col.setFlags(Qt.ItemIsSelectable | Qt.ItemIsEnabled)
self.list.setItem(rowCount, index, col)
