messages.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Oct 22 11:46:00 2018

@author: martindrech
"""

from PyQt5.QtWidgets import QMessageBox

def show_warning(text, details_text = ''):
   msg = QMessageBox()
   msg.setIcon(QMessageBox.Warning)

   msg.setText(text)

   msg.setWindowTitle("Oh dear")
   if details_text:
       msg.setDetailedText(details_text)
       
   msg.setStandardButtons(QMessageBox.Ok)
   msg.buttonClicked.connect(msgbtn)
	
   retval = msg.exec_()
   #print("value of pressed message box button:", retval)
   
   
def msgbtn(i):
   print("Button pressed is:",i.text())