self.treeWidget.addTopLevelItems(items)

    def addLineSlot(self):

        for i in range(0, len(self.conf.specifications)):

            d.append(self.widgets[i].text())

        items = [QTreeWidgetItem(d)]

            data = {}

            j = 0

            for s in specs:

                j += 1

            items.append(data)

        return items

        self.treeWidget.setColumnCount(len(self.conf.specifications))

        vbox.addWidget(self.treeWidget)

        for s in self.conf.specifications:

            edit = QLineEdit()

            edit.setPlaceholderText(self.tr(s.placeholder))

            hbox.addWidget(edit)

        addbutton = QPushButton(self.tr("Add"))