How to reference the app context from window on appcontext?

I got a question on how to reference the appcontext while the window component are itself part of the appcontext attribute. Here is my code snippet setup so far.

#Main Window Component
class MainWindow(QMainWindow):
    def __init__(self,ctx):
        super().__init__()  # inherit the parent class attributes
        self.ctx =ctx

#Application Context Class
class AppContext(ApplicationContext):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.window = MainWindow()

    # show the main window and
    def run(self):
    #method to get the resource image
    def getImg(self):
        return self.get_resource('sample.png')

if __name__ == '__main__':
    appctxt = AppContext()

I guess my question is how could i pass appcontext as a object reference into the MainWindow compnent as reference when MainWindow itself is initialised inside the appcontext?

Thanks for helping out on this dumb question.

Actually, I figured that all I need to do is as below to cross reference class.
self.window = MainWindow(self)

Problem Solved.

Great you worked it out, but another way you can do this is by passing your AppContext to your MainWindow as you create it. In your example code MainWindow accepts a single parameter ctx which is intended for this.