PyQt5: Closing Main Window from Another File - Multiple Instance Issue

[shashanksd]

I'm encountering a challenge in my PyQt5 application. I have a main window created in one file (common_methods.py). I want to close this window from another file (Main_controller.py). However, when I attempt to close it, unable to close it

Below is my code,

common_methods.py

class Common_methods:
    def __init__(self):
        pass

    def mainScreen(self):
        # Code to create and show the main window
        # ...
        return mainWindow

Main_controller.py

class Main_controller:
    def __init__(self):
        pass

    def newPrj(self):
        common_method_instance = Common_methods()
        mainScreen_instance = common_method_instance.mainScreen()  # Calling mainScreen again?
        mainScreen_instance.close()

[JonB]

@shashanksd
Each time you call common_method_instance.mainScreen() that creates a new mainScreen_instance assuming your comment

# Code to create and show the main window

is true, and it is that which you close.

I'm not saying whether your architecture is good, it's odd, but given what you are doing you need to keep a reference to the initially created main window around somewhere.