#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *

class MyWidget(QWidget):
    def __init__  (self):
        QWidget. __init__ (self)
    myclose = False # myclose = True - закроете X

    def closeEvent(self,event):
        if self.myclose:
            print self.myclose
        else:
            event.ignore()
            print self.myclose, "ignore"
app = QApplication(sys.argv)
widget = MyWidget()
widget.show()
sys.exit(app.exec_())