wx python calculadora

calculadora.py

#!/usr/bin/python
import wx
class agenda(wx.Frame):
  def __init__(self, parent, id, title):
		wx.Frame.__init__(self, parent, id, title)
		self.parent = parent
		self.initialize()
	def initialize(self):
		grilla = wx.GridBagSizer()
		self.texto = wx.TextCtrl(self,-1,value=u"#1")
		self.texto2 = wx.TextCtrl(self,-1,value=u"#2")
        	boton1 = wx.Button(self,label="SUMA")
		boton1.Bind(wx.EVT_BUTTON, self.sicliqueaboton1)
		boton2 = wx.Button(self,label="RESTA")
		boton2.Bind(wx.EVT_BUTTON, self.sicliqueaboton2)
		boton3 = wx.Button(self,label="MULTIPLICACION")
		boton3.Bind(wx.EVT_BUTTON, self.sicliqueaboton3)
		boton4 = wx.Button(self,label="DIVISION")
		boton4.Bind(wx.EVT_BUTTON, self.sicliqueaboton4)
		self.label = wx.StaticText(self,-1,label=u"resultado:")
		grilla.Add(self.texto,(0,1))
		grilla.Add(self.texto2,(0,2))
		grilla.Add(self.label,(0,3))
		grilla.Add(boton1,(1,1))
		grilla.Add(boton2,(1,4))
		grilla.Add(boton3,(1,2))
		grilla.Add(boton4,(1,3))
		grilla.AddGrowableCol(0)
		self.SetSizerAndFit(grilla)
		self.Show(True)
	def sicliqueaboton1(self,event):
		xd = int(self.texto.GetValue()) + int(self.texto2.GetValue())
		abu = "%i" % xd
		self.label.SetLabel(abu)
	def sicliqueaboton2(self,event):
		xd = int(self.texto.GetValue()) - int(self.texto2.GetValue())
		abu = "%i" % xd
		self.label.SetLabel(abu)
	def sicliqueaboton3(self,event):
		xd = int(self.texto.GetValue()) * int(self.texto2.GetValue())
		abu = "%i" % xd
		self.label.SetLabel(abu)
	def sicliqueaboton4(self,event):
		xd = int(self.texto.GetValue()) / int(self.texto2.GetValue())
		abu = "%i" % xd
		self.label.SetLabel(abu)
app = wx.App()
frame = agenda (None, -1, "calculadora by daryo")
app.MainLoop()