How would I create an event for when a box is checked/unchecked? For this example I just want it to print the data about the object that was checked

NOTE: This code was modified from <http://www.blog.pythonlibrary.org/2009/12/23/wxpython-using-objectlistview-instead-of-a-listctrl/> as a learning exercise

```
import wx
from ObjectListView import ObjectListView, ColumnDefn

########################################################################
class Book(object):
    """
    Model of the Book object

    Contains the following attributes:
    'ISBN', 'Author', 'Manufacturer', 'Title'
    """
    #----------------------------------------------------------------------
    def __init__(self, title, author, isbn, mfg):
        self.isbn = isbn
        self.author = author
        self.mfg = mfg
        self.title = title

########################################################################
class MainPanel(wx.Panel):
    #----------------------------------------------------------------------
    def __init__(self, parent):
        wx.Panel.__init__(self, parent=parent, id=wx.ID_ANY)
        self.products = [Book("wxPython in Action", "Robin Dunn",
                              "1932394621", "Manning"),
                         Book("Hello World", "Warren and Carter Sande",
                              "1933988495", "Manning")
                         ]

        self.dataOlv = ObjectListView(self, wx.ID_ANY, style=wx.LC_REPORT|wx.SUNKEN_BORDER)
        self.setBooks()
        self.dataOlv.CreateCheckStateColumn()        

        # Allow the cell values to be edited when double-clicked
        self.dataOlv.cellEditMode = ObjectListView.CELLEDIT_SINGLECLICK

        # create an update button
        updateBtn = wx.Button(self, wx.ID_ANY, "Update OLV")
        updateBtn.Bind(wx.EVT_BUTTON, self.updateControl)

        # Create some sizers
        mainSizer = wx.BoxSizer(wx.VERTICAL)

        mainSizer.Add(self.dataOlv, 1, wx.ALL|wx.EXPAND, 5)
        mainSizer.Add(updateBtn, 0, wx.ALL|wx.CENTER, 5)
        self.SetSizer(mainSizer)

    #----------------------------------------------------------------------
    def updateControl(self, event):
        """

        """
        print "updating..."
        product_dict = [Book("Core Python Programming", "Wesley Chun",
                         "0132269937", "Prentice Hall"),
                        Book("Python Programming for the Absolute Beginner",
                         "Michael Dawson", "1598631128", "Course Technology"),
                        Book("Learning Python", "Mark Lutz",
                         "0596513984", "O'Reilly")
                        ]
        data = self.products + product_dict
        self.dataOlv.SetObjects(data)

    #----------------------------------------------------------------------
    def setBooks(self, data=None):
        self.dataOlv.SetColumns([
            ColumnDefn("Title", "left", 220, "title"),
            ColumnDefn("Author", "left", 200, "author"),
            ColumnDefn("ISBN", "right", 100, "isbn"),
            ColumnDefn("Mfg", "left", 180, "mfg")
        ])

        self.dataOlv.SetObjects(self.products)

########################################################################
class MainFrame(wx.Frame):
    #----------------------------------------------------------------------
    def __init__(self):
        wx.Frame.__init__(self, parent=None, id=wx.ID_ANY,
                          title="ObjectListView Demo", size=(800,600))
        panel = MainPanel(self)

########################################################################
class GenApp(wx.App):

    #----------------------------------------------------------------------
    def __init__(self, redirect=False, filename=None):
        wx.App.__init__(self, redirect, filename)

    #----------------------------------------------------------------------
    def OnInit(self):
        # create frame here
        frame = MainFrame()
        frame.Show()
        return True

#----------------------------------------------------------------------
def main():
    """
    Run the demo
    """
    app = GenApp()
    app.MainLoop()

if __name__ == "__main__":
    main()

```