from PySide2.QtCore import Qt, QPersistentModelIndex
from PySide2.QtGui import QStringListModel
if __name__ == '__main__':
stringListModel = QStringListModel(['one', 'two'])
idx = stringListModel.index(1, 0)
persistentModelIndex = QPersistentModelIndex(idx)
stringListModel.data(persistentModelIndex, Qt.DisplayRole)