Textfields for numbers

I am not sure if wxPython has a textfield allowing only for numbers (floats or ints).
I found an old mailinglist entry for such a thing and made some changes to the code.

Why would i need that ?
For a small GUI for HDDCleaner for example ?
Anyway here is the code:

import wx

#------------------- stuff to test functionality start ---------  
class TestApp(wx.App):  
    def OnInit(self):  
        frame = MyFrame(None, -1, "Numerical Textfield")  
        frame.Show(True)  
        self.SetTopWindow(frame)  
        return True

class MyFrame(wx.Frame):  
    def __init__(self, parent, ID, title):  
        wx.Frame.__init__(self, parent, ID, title, wx.DefaultPosition, wx.Size(300, 150))  
        panel = wx.Panel(self, -1)  
        self.textfield = NumericTextfield(panel, 10, "", wx.Point(20, 10), wx.Size(100, 20))  
        self.intButton = wx.Button(panel, -1,label='int',pos=(100,50))  
        self.floatButton = wx.Button(panel, -1,label='float',pos=(200,50))

        self.intButton.Bind(wx.EVT_BUTTON, self.GetInt)  
        self.floatButton.Bind(wx.EVT_BUTTON, self.GetFloat)

    def GetInt(self,event):  
        print self.textfield.GetIntValue()

    def GetFloat(self,event):  
        print self.textfield.GetFloatValue()  
#------------------- stuff to test functionality end ---------

#logic goes here  
class NumericTextfield(wx.TextCtrl):  
    def __init__(self, parent, ID, title,  
                 position, size, allowFloat=True):  
        wx.TextCtrl.__init__(self, parent, ID, title,  
                            position, size)  
        wx.EVT_CHAR(self, self.OnChar)  
        self.allowFloat=allowFloat

    def OnChar(self, event):  
        key = event.GetKeyCode()

        #print event.GetKey  
        if key > 47 and key < 58: #range for numbers  
            event.Skip()  
        #we allow only for one decimal point and only if we want a floatfield   
        elif key == 46 and self.allowFloat==True:   
            if '.' not in self.GetValue():  
                if self.GetInsertionPoint() != 0:  
                    event.Skip()  
        elif key == 8 or key == 127: #backspace and del  
            event.Skip()  
        elif key> 314 and key < 318: #cursor left up, right and down  
            event.Skip()  
        print key

    #retrieve the value as float  
    def GetFloatValue(self):  
        return float(self.GetValue())

    #retrieve the value as int  
    def GetIntValue(self):  
        return int(float(self.GetValue()))

#------------------- stuff to test functionality start ---------  
app = TestApp(0)  
app.MainLoop()