[PyQt] [Solved]Add a SpinBox to MsgBox or Carry Variable Over?

[Extra]

Thanks for the suggestion. I'll nest my CheckoutPopup (spindemo) inside my main code if I have to, but I'm wondering if it's possible to take a variable from my AdminMenu.py and use it in my CheckoutPopup.py?

I'm trying to take the "name" variable (or TestVariable) and bring it over to my CheckoutPopup.py

Is there a way to carry the variable over to the other code or is it just better to have the CheckoutPopup nested inside my AdminMenu.py?

Snippet from AdminMenu.py

    def getCellText(self):
        if self.InventoryDisplay.selectedIndexes():
            item = self.InventoryDisplay.selectedIndexes()[0]
            row = self.selectedRow()
            column = self.selectedColumn()
            if not item == None:
                name = item.data()
                self.sbar.showMessage(str(name))
                
                #For Testing:
                global TestVariable
                TestVariable = item.data()

            print(name)

Snippet from CheckoutPopup.py:

    def currentValue(self):
     
      #Show the current value of the SpinBox in real time
      from AdminMenu import TestVariable
      self.messageText.setText("You are taking: "+str(self.CheckoutSpinBox.value()) + " " + TestVariable)

Error:

Error:
    from AdminMenu import TestVariable
ImportError: cannot import name 'TestVariable' from 'AdminMenu' 

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Update:
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So I tried bringing the CheckoutSpinBox.value() to my AdminMenu.py but I get 0 every time. It's a step further but I need the value that the user entered once the Confirm Button is clicked (ConfirmClicked) not the default value of the spinbox (0). Is there a way to get that value the way I'm currently trying to do it?

Here's what I did in my AdminMenu.py

#----------------------------------
    #Checkout Function
    def CheckoutClicked(self):
        #Print in terminal for testing:
        print("The Checkout Button was clicked")

        from CheckoutPopup import Ui_CheckoutPopup
        x = Ui_CheckoutPopup()
        x.ConfirmClicked()
        print(x.CheckoutSpinBox.value())

        self.win = Ui_CheckoutPopup()
        self.win.show()
        #self.close()

#----------------------------------