Простой todo на PyQT4

pyqt_todo.py

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore

item_count=10

class Todo(QtGui.QWidget):
  '''Новый виджет Todo'''
  def __init__(self, parent=None):
    QtGui.QWidget.__init__(self, parent)
    self.items = []
    self.checks = []

    self.setGeometry(300, 300, 250, item_count*30+20)

    for i in range(item_count):
        self.items.append(QtGui.QLineEdit('Done this %d' % i, self))
        self.checks.append(QtGui.QCheckBox('', self))
        self.move_line(i,i)
        self.connect(self.checks[i], QtCore.SIGNAL('stateChanged(int)'), 
          self.change_state)

  def move_line(self, index, screen_index):
    '''Сдвигает QCheckBox и QLineEdit в нужную позицию'''
    self.items[index].move(40, 30*screen_index+10)
    self.checks[index].move(10, 30*screen_index+15)

  def change_state(self, value):
    '''Обновляет позиции кнопок'''
    screen_index = 0
    for checked in (False,True):
      for i in range(item_count):
        if (self.checks[i].isChecked()==checked):
          self.move_line(i, screen_index)
          screen_index+=1

app = QtGui.QApplication(sys.argv)
todo = Todo()
todo.show()
app.exec_()