Passing data between MainForm and Form1 in Python Windows Application

Hi,

I want to pass values between two Forms (Python Windows Application). How can I do it?

I have two forms: MainForm and Form1.

MainForm  contains one button and a Label. When I click on that button, Form1 should open and MainForm should be in inactive mode (i.e not selectable).

Form1 contains one submit button. When I click the submit button in Form1, the Form1 should close and change the text label in MainForm.

How can I do it? Can somebody help me to do this?