Qt for Python (PySide/Shiboken)

from PySide6.QtWidgets import QApplication, QListView from PySide6.QtCore import QAbstractListModel, QModelIndex, Qt import sys import typing class ChoiceModel(QAbstractListModel): def __init__(self, data: typing.List[dict]) -> None: super().__init__() self._data = data def rowCount(self, parent: QModelIndex = QModelIndex()) -> int: if parent == QModelIndex(): return len(self._data) return 0 def data(self, index: QModelIndex, role: int = Qt.DisplayRole) -> typing.Any: if not index.isValid(): return None if role == Qt.DisplayRole: return self._data[index.row()]["name"] if role == Qt.CheckStateRole: return Qt.Checked if self._data[index.row()]["checked"] else Qt.Unchecked def setData( self, index: QModelIndex, value: typing.Any, role: int = Qt.CheckStateRole ) -> bool: if role != Qt.CheckStateRole: return False if not index.isValid() or index.column() > 0: return False # Update the checked state self._data[index.row()]["checked"] = True if value == Qt.Checked else False state = "checked" if value == Qt.Checked else "unchecked me" print(f"Item '{self._data[index.row()]['name']}' is now {state}") # Notify the view of the change self.dataChanged.emit(index, index, [Qt.CheckStateRole]) return True def flags(self, index: QModelIndex) -> Qt.ItemFlags: if not index.isValid(): return Qt.NoItemFlags return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsUserCheckable def checked_items(self): return [it["name"] for it in self._data if it["checked"]] if __name__ == "__main__": app = QApplication(sys.argv) view = QListView() model = ChoiceModel( [{"name": "Item 1", "checked": True}, {"name": "Item 2", "checked": False}] ) view.setModel(model) view.show() app.exec() what is wrong? check box not working , anyone fix this codes for me? checkbox not working