有没有办法通过subproces.Popen发送PySide2模型？

如何解决有没有办法通过subproces.Popen发送PySide2模型？

在我的MainApp中，我有一个QTreeView，其中填充了QStandardItemModel中的项目。通过单击按钮，我使用subprocess.Popen启动3D软件（在本例中为Maya2020）。 Maya运行后，我将在其脚本编辑器中执行一段代码，以打开名为SubApp的小部件。

我想以某种方式将MainApp的模型数据传递到SubApp的QTreeView。在启动SubApp的真实代码中，我使用环境变量发送一些键值（UUID和UUID父级列表）来再次重建模型/视图。这感觉太复杂了，我想知道是否有更好的共享数据的方法？

我的代码：（注意！为简单起见，我将MainApp和SubApp包含在同一模块中，但这些类在实际中是分离的）

main_launch.py​​

import os
import sys
import subprocess

from Qt import QtWidgets,QtGui


class MainApp(QtWidgets.QWidget):
    """ This is the main launcher app that holds the model data
    """
    def __init__(self,parent=None):
        super(MainApp,self).__init__(parent)

        # Model/View
        view = QtWidgets.QTreeView()
        model = QtGui.QStandardItemModel()
        view.setModel(model)

        # Populate data
        for i in range(3):
            parent1 = QtGui.QStandardItem('Parent {}'.format(i))
            for j in range(3):
                child1 = QtGui.QStandardItem('Child {}'.format(i * 3 + j))
                child2 = QtGui.QStandardItem('row: {},col: {}'.format(i,j + 1))
                child3 = QtGui.QStandardItem('row: {},j + 2))
                parent1.appendRow([child1,child2,child3])
            model.appendRow(parent1)
            # span container columns
            view.setFirstColumnSpanned(i,view.rootIndex(),True)

        # GUI
        btn_launch = QtWidgets.QPushButton('launch sub app')
        btn_launch.clicked.connect(self.on_launch_sub_app)

        # Layout
        main_layout = QtWidgets.QHBoxLayout(self)
        main_layout.addWidget(view)
        main_layout.addWidget(btn_launch)
        self.setLayout(main_layout)

        self.root_path = os.path.join(os.path.dirname(os.path.realpath(__file__))).replace('\\','/')

        # Copy this path when it prints and paste it into "maya_snippet"s "root_path"
        print(self.root_path)

    def on_launch_sub_app(self):
        """ Opens software (maya in this case) and then you launch SubApp from within maya's script editor.

        Is there any way to send the model data using subprocess.Popen?
        """
        # Maya location
        app_exe = r'C:/Program Files/Autodesk/Maya2020/bin/maya.exe'

        proc = subprocess.Popen(
            [app_exe]
        )


class SubApp(QtWidgets.QWidget):
    """ Running the "maya_snippet.py" code from within maya will launch this window
    """
    def __init__(self,parent=None):
        super(SubApp,self).__init__(parent)

        # Model/View
        view = QtWidgets.QTreeView()

        # Would like to set the model from the MainApp
        model = QtGui.QStandardItemModel()
        view.setModel(model)

        # Layout
        main_layout = QtWidgets.QHBoxLayout(self)
        main_layout.addWidget(view)
        self.setLayout(main_layout)


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    window = MainApp()
    window.resize(400,400)
    window.show()
    sys.exit(app.exec_())

maya_snippet.py （在Maya中运行此程序以启动SubApp（从MainApp启动Maya之后））

import sys

# Change root_path to the directory holding main_launch.py
root_path = 'path/to/directory/holding/main_launch'

if not root_path in sys.path:
    sys.path.append(root_path.replace('\\','/')

import main_launch

w = main_launch.SubApp()
w.show()