@Slot(QModelIndex)
def slot_left_clicked(self, start_index):
    button = QApplication.mouseButtons()
    if (button == Qt.LeftButton):
        real_index = self.sort_filter_model.mapToSource(start_index)
        self.sig_left_clicked.emit(real_index)
@Slot(QModelIndex)
def slot_left_clicked(self, start_index):
    button = QApplication.mouseButtons()
    if (button == Qt.LeftButton):
        real_index = self.sort_filter_model.mapToSource(start_index)
        self.sig_left_clicked.emit(real_index)