How do I open sub window after I click on button on main screen in PyQt4

Question

HI I am trying to make a simple converter. I have used PyQt4 designed to make the Gui I want to know how launch a new window after I click on the individual button.

Answer 1

Make two programs: main_win.py and second_win.py, then in main_win.py put this lines:

from os import system as sh               //In the begin

def openewin(self):                       //In the class main_win
    sh("python second_win.py") 

Ready, just connect the push button to function openewin!