PyQt: file save dialog (in windows)

make class:

class OpenFile(QtGui.QMainWindow):

   def __init__(self, parent=None):

       QtGui.QMainWindow.__init__(self, parent)

       self.setGeometry(300, 300, 350, 300)

       self.setWindowTitle('SaveFile')

       self.textEdit = QtGui.QTextEdit()

       self.setCentralWidget(self.textEdit)

       self.statusBar()

       self.setFocus()

       exit = QtGui.QAction(QtGui.QIcon('open.png'), 'Open', self)

       exit.setShortcut('Ctrl+O')

       exit.setStatusTip('Open new File')

       self.connect(exit, QtCore.SIGNAL('triggered()'), self.showDialog)

       menubar = self.menuBar()

       file = menubar.addMenu('&File')

       file.addAction(exit)

   def showDialog(self,text):

       filename = QtGui.QFileDialog.getSaveFileName(self, 'Save file', '')

       f=open(filename.toUtf8().data().decode('utf-8').encode('cp1251'),'w')

       f.write(text.toUtf8().data().decode('utf-8').encode('cp1251'))

     

in MainWindow class writing:

    def __init__(self, win_parent = None):

        ...

        #save stats in file

        self.connect(self.saveButton, QtCore.SIGNAL("clicked()"), self.saveFile)

    def saveFile(self):

        cd = OpenFile()

        cd.showDialog(self.textStatistic.toPlainText())