从PyQt中的线程修改模型数据

Question

当代理模型连接到视图时，从另一个线程修改QSortFilterProxyModel的源模型时遇到麻烦。代理模型似乎在正在显示的模型中添加了“鬼影”项目，这些空白项目无法（显然）无法与之交互

此示例代码演示了我遇到的问题，并简化为一个基本示例，其中每个代理模型和源模型都有一个视图：

from PySide2 import QtCore, QtGui, QtWidgets
import random


WordList = ["apples", "pears", "down", "stairs", "mother", "hubord", "isn't", "cupboard", "lemon", "tango", "apricot", "nuke"]

class Searcher(QtCore.QThread):
    def __init__(self, model):
        super(Searcher, self).__init__()
        self.model = model

    def run(self):
        populateModel(self.model)


def populateModel(model):
    for i in range(5):
        item1 = QtGui.QStandardItem()
        model.invisibleRootItem().appendRow(item1)
        majorWord = random.choice(WordList)
        item1.setData(majorWord, QtCore.Qt.DisplayRole)

        for i in range(random.randint(2, 8)):
            item2 = QtGui.QStandardItem()
            item1.appendRow(item2)
            item2.setData(os.path.join(majorWord, random.choice(WordList)), QtCore.Qt.DisplayRole)


if __name__ == '__main__':
    tv = QtWidgets.QTreeView()
    tv.setWindowTitle("Source Model, Threaded")
    tv.show()

    tv2 = QtWidgets.QTreeView()
    tv2.setWindowTitle("Proxy Model, Threaded")
    tv2.show()

    tv3 = QtWidgets.QTreeView()
    tv3.setWindowTitle("Proxy Model 2, No Threading")
    tv3.show()

    sourceModel = QtGui.QStandardItemModel()
    tv.setModel(sourceModel)

    proxyModel = QtCore.QSortFilterProxyModel()
    proxyModel.setDynamicSortFilter(True)
    proxyModel.setSourceModel(sourceModel)
    tv2.setModel(proxyModel)

    s = Searcher(sourceModel)
    s.start()

    sm3 = QtGui.QStandardItemModel()
    pm3 = QtCore.QSortFilterProxyModel()
    pm3.setSourceModel(sm3)
    proxyModel.setDynamicSortFilter(True)
    tv3.setModel(pm3)
    populateModel(sm3)

我认为代理模型的setDynamicSortFilter属性可能有用，但似乎没有任何作用。

任何帮助或指点表示赞赏！