class AbstractModel(object):

     def __init__(self):

         self.listeners = []

     def addListener(self, listenerFunc):

         self.listeners.append(listenerFunc)

     def removeListener(self, listenerFunc):

         self.listeners.remove(listenerFunc)

     def update(self):

         for eachFunc in self.listeners:

             eachFunc(self)

 #!usr/bin/env python

 import wx

 import abstractmodel

 class SimpleName(abstractmodel.AbstractModel):

     def __init__(self,first="",last=""):

         abstractmodel.AbstractModel.__init__(self)

         self.set(first,last)

     def set(self,first,last):

         self.first = first

         self.last = last

         self.update()

 class ModelExample(wx.Frame):

     def __init__(self,parent,id):

         wx.Frame.__init__(self,parent,id,'Flintstones',size=(340,200))

         panel = wx.Panel(self)

         panel.SetBackgroundColour("White")

         self.Bind(wx.EVT_CLOSE,self.OnCloseWindow)

         self.textFields = {}

         self.createTextFields(panel)

         self.model = SimpleName()

         self.model.addListener(self.OnUpdate)

         self.createButtonBar(panel)

     def buttonData(self):

         return(("Fredify",self.OnFred),

                 ("Wilmafy",self.OnWilma),

                 ("Barnify",self.OnBarney),

                 ("Bettify",self.OnBetty))

     def createButtonBar(self,panel,yPos=0):

         xPos=0

         for eachLabel,eachHandler in self.buttonData():

             pos = (xPos,yPos)

             button =self.buildOneButton(panel,eachLabel,eachHandler,pos)

             xPos += button.GetSize().width

     def buildOneButton(self,parent,label,handler,pos=(0,0)):

         button = wx.Button(parent,-1,label,pos)

         self.Bind(wx.EVT_BUTTON,handler,button)

         return button

     def textFieldData(self):

         return (("First Name",(10,50)),("Last Name",(10,80)))

     def createTextFields(self,panel):

         for eachLabel,eachPos in self.textFieldData():

             self.createCaptionedText(panel,eachLabel,eachPos)

     def createCaptionedText(self,panel,label,pos):

         static = wx.StaticText(panel,wx.NewId(),label,pos)

         static.SetBackgroundColour("White")

         textPos = (pos[0]+75,pos[1])

         self.textFields[label] = wx.TextCtrl(panel,wx.NewId(),

                 "",size=(100,-1),pos=textPos,

                 style=wx.TE_READONLY)

     def OnUpdate(self,model):

         self.textFields["First Name"].SetValue(model.first)

         self.textFields["Last Name"].SetValue(model.last)

     def OnFred(self,event):

         self.model.set("Fred","Flintstones")

     def OnBarney(self,event):

         self.model.set("Barney","Rubble")

     def OnWilma(self,event):

         self.model.set("Wilma","Flintstones")

     def OnBetty(self,event):

         self.model.set("Betty","Rubble")

     def OnCloseWindow(self,event):

         self.Destroy()

 if __name__ == '__main__':

     app = wx.PySimpleApp()

     frame = ModelExample(parent=None,id=-1)

     frame.Show()

     app.MainLoop()