3d slicer - passing/setting a variable in a python module at startup

BlenderTest.py

"""
@author: Patrick R. Moore, Georgi Talmazov

"""

from __main__ import vtk, qt, ctk, slicer

class BlenderTest:
    def __init__(self, parent):
        parent.title = "blender_test"
        parent.categories = ["Dentistry"]
        parent.dependencies = []
        parent.contributors = ["Patrick Moore", "Georgi Talmazov (Dental Software Foundation)"] # replace with "Firstname Lastname (Org)"
        parent.helpText = """
        Example of scripted loadable extension for the HelloPython tutorial that monitors a directory for file changes.
        """
        parent.acknowledgementText = """Independently developed for the good of the world""" # replace with organization, grant and thanks.
        self.parent = parent

#
# qHelloPythonWidget
#

class BlenderTestWidget:
    def __init__(self, parent = None):
        if not parent:
            self.parent = slicer.qMRMLWidget()
            self.parent.setLayout(qt.QVBoxLayout())
            self.parent.setMRMLScene(slicer.mrmlScene)
        else:
            self.parent = parent
        self.layout = self.parent.layout()
        if not parent:
            self.setup()
            self.parent.show()

        self.host_port = 5959
        
    def setup(self):
        # Instantiate and connect widgets ...
        
        # Collapsible button
        sampleCollapsibleButton = ctk.ctkCollapsibleButton()
        sampleCollapsibleButton.text = "Configuration:"
        self.layout.addWidget(sampleCollapsibleButton)

        # Layout within the sample collapsible button
        self.sampleFormLayout = qt.QFormLayout(sampleCollapsibleButton)
        #Models list
        addModelButton = qt.QPushButton("Add Model")
        addModelButton.toolTip = "Add a model to the list to sync with Blender."
        self.sampleFormLayout.addRow(addModelButton)
        #addModelButton.connect('clicked()', self.onaddModelButtonToggled)

    def connect_to_blender(self, port):
        self.host_port = port
        print(self.host_port)

start_slicer.py

import subprocess

slicer_startup_parameters = ''.join(("slicer.util.selectModule('BlenderTest')\n",
                                     "slicer.util.getModule('BlenderTest').widgetRepresentation().self().connect_to_blender(55)"))

subprocess.Popen(["C:\\ProgramData\\NA-MIC\\Slicer 5.0.2\\Slicer.exe", "--python-code", slicer_startup_parameters])