PyQt在发出QStandardItemMod时崩溃

Question

我通过一个信号将模型从非GUI线程发送到GUI线程，以便创建QTableView并设置模型。不幸的是，应用程序崩溃了。在设置QTableView之前，当我在diagram类中发出字典和准备模型时，一切都是有效的。我做错什么了？我使用的是python3.4和PyQt 5.4.1。在

以下是代码片段：

class CheckNE(QObject):

    #some code ...

    neTreeForEnvAlmsChanged = pyqtSignal(QStandardItemModel, QStandardItemModel)

    def check_bts_envalms(self, modelEnvBscAlm):  # i call it from other CheckNE member function

        #some code, i'm creating modelEnvBtsAlm here...

        print('Before emitting neTreeForEnvAlmsChanged')
        self.neTreeForEnvAlmsChanged.emit(modelEnvBtsAlm, modelEnvBscAlm)
        print('After emitting neTreeForEnvAlmsChanged')


class MainWindow(QMainWindow):

    #some code ...

    @pyqtSlot(QStandardItemModel, QStandardItemModel)
    def retrieveTreeForEnvAlm(self, modelBtsEnv, modelBscEnv):
        print('Receiving neTreeForEnvAlmsChanged')

        dialogTableWorker = TableDialog(modelBtsEnv, modelBscEnv)
        print('Before showing dialog')
        dialogTableWorker.show_table_dialog()
        print('After showing dialog')


class TableDialog(QDialog, Ui_Dialog_Table):
    def __init__(self, modelBts, modelBsc):
        print('Beginning init of TableDialog')
        super(TableDialog, self).__init__()
        self.setupUi(self)
        self.tableView.setModel(modelBts)  # tableView created in Qt Designer
        print('Ending init of TableDialog')

    def show_table_dialog(self):
        print('Showing TableDialog started')
        self.exec_()
        print('Showing TableDialog ended')


def main():

    app = QApplication(sys.argv)

    main_window = MainWindow()
    checkNeWorker = CheckNE()
    checkNeWorkerThread = QThread()

    main_window.show()
    main_window.raise_()

    checkNeWorker.moveToThread(checkNeWorkerThread)
    checkNeWorker.neTreeForEnvAlmsChanged.connect(main_window.retrieveTreeForEnvAlm)
    checkNeWorkerThread.start()

    app.exec_()

main()

结果：

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但当我在调试中使用断点时：

print('Before emitting neTreeForEnvAlmsChanged')

每件事都很有魅力：

Before emitting neTreeForEnvAlmsChanged
Receiving neTreeForEnvAlmsChanged
Beginning init of TableDialog
After emitting neTreeForEnvAlmsChanged
Ending init of TableDialog
Before showing dialog
Showing TableDialog started
Showing TableDialog ended
After showing dialog

Answer 1

当你声明信号和时隙时，你需要引用这些类型，因为它们不是Python类型，但是它们是C++级别定义的。正如文档所说：定义信号的C++签名的类型。每种类型都可以是Python类型对象，或者是C++类型的字符串。

pyqtSignal('QStandardItemModel', 'QStandardItemModel')

以及

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应该能解决你的问题。在