QTableView добавление CheckBox

writer = csv.writer(out, dialect='excel', delimiter=';')
                for row in csv.reader(inp, dialect='excel', delimiter=';'):
                    if any(field.strip() for field in row):
                        writer.writerow(row+[' '])

import sys
import export__pyqt_csv
from PyQt4 import QtGui, QtCore
 
class MainWindow(QtGui.QMainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
 
        self.resize(250, 150)
        self.setWindowTitle('menubar')
        exit = QtGui.QAction(QtGui.QIcon('icons/exit.png'), 'Start', self)
        exit.setShortcut('Ctrl+Q')
        exit.setStatusTip('Start')
        self.connect(exit, QtCore.SIGNAL('triggered()'), QtCore.SLOT('close()'))
 
        self.statusBar()
 
 
        menubar = self.menuBar()
        file = menubar.addMenu('&File')
        file.addAction(exit)
 
 
 
 
if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    main = MainWindow()
    main.show()
    main2 = export__pyqt_csv.MyWindow()
    main2.show()
    sys.exit(app.exec_())

def start(self):
        self.main2 = export__pyqt_csv.MyWindow()
        self.main2.show()

self.connect(start, QtCore.SIGNAL('triggered()'), self.start)

start.triggered.connect(self.start)