Something

# -*- coding: utf-8 -*-
import sys
from PyQt4 import QtCore, QtGui

from edytor import Ui_notepad

class StartQt4(QtGui.QMainWindow):
	def __init__(self, parent=None):
		QtGui.QWidget.__init__(self, parent)
		self.ui = Ui_notepad()
		self.ui.setupUi(self)
		
		# Here we connect signals with our slots
		QtCore.QObject.connect(self.ui.button_open, QtCore.SIGNAL("clicked()"), self.file_dialog)
		QtCore.QObject.connect(self.ui.button_save, QtCore.SIGNAL("clicked()"), self.file_save)
		
	def file_dialog(self):
		fd = QtGui.QFileDialog(self)
		self.filename = fd.getOpenFileName()
		from os.path import isfile
		if isfile(self.filename):
			import codecs
			text = codecs.open(self.filename, 'r', 'utf-8').read()
			self.ui.editor_window.setPlainText(text)
			
	def file_save(self):
		from os.path import isfile
		if isfile(self.filename):
			import codecs
			file = codecs.open(self.filename, 'w', 'utf-8')
			file.write(unicode(self.ui.editor_window.toPlainText()))
			file.close()
		
if __name__ == "__main__":
	app = QtGui.QApplication(sys.argv)
	myapp = StartQt4()
	myapp.show()
	sys.exit(app.exec_())




Traceback (most recent call last):
  File "start.py", line 21, in file_dialog
    if isfile(self.filename):
  File "/usr/lib/python2.5/posixpath.py", line 208, in isfile
    st = os.stat(path)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xf3 in position 23: ordinal not in range(128)