Attempt to cheat maya into thinking that my custom drag is from script editor, but it did not work, even if I used pickled "real" data when dragging from script editor

mute_screen_grab_drag.py

def startDrag(self, supportedActions):
    print('start drag')
    listsQModelIndex = self.selectedIndexes()
    if listsQModelIndex:
        # dataQMimeData = self.model().mimeData(listsQModelIndex)
        # insert fake x-maya-data
        dataQMimeData = QtCore.QMimeData()
        encoded = QtCore.QByteArray()

        # failed attempt to cheat maya
        # import pickle
        # encoded = pickle.load( open( "/tmp/fake", "rb" ) )
        # dataQMimeData.setData('application/x-maya-data', encoded)
        
        dataQMimeData.setData('text/plain', 'random text')
        print('current formats', dataQMimeData.formats())

        if not dataQMimeData:
            return None
        dragQDrag = QtGui.QDrag(self)
        # disable widget screenshot
        # dragQDrag.setPixmap(QtGui.QPixmap('test.jpg')) # <- For put your custom image here
        dragQDrag.setMimeData(dataQMimeData)
        defaultDropAction = QtCore.Qt.IgnoreAction
        if ((supportedActions & QtCore.Qt.CopyAction) and (self.dragDropMode() != QtWidgets.QAbstractItemView.InternalMove)):
            defaultDropAction = QtCore.Qt.CopyAction;
        dragQDrag.exec_(supportedActions, defaultDropAction)