from PySide6.QtCore import Qt, QAbstractListModel


class SkeletonModel(QAbstractListModel):
    def rowCount(self, parent):
        return 0 if parent.isValid() else 3

    def data(self, index, role=Qt.DisplayRole):
        return None

    def sort(self, column, order=Qt.AscendingOrder):
        self.layoutAboutToBeChanged.emit([], QAbstractListModel.VerticalSortHint)
        self.layoutChanged.emit([], QAbstractListModel.VerticalSortHint)


m = SkeletonModel()
m.sort(0)

Traceback (most recent call last):
  File "script.py", line 17, in <module>
    m.sort(0)
  File "script.py", line 13, in sort
    self.layoutChanged.emit([], QAbstractListModel.VerticalSortHint)
TypeError: layoutChanged() only accepts 0 argument(s), 2 given!