wx python get icon from blob

Can anyone please point me to a resource that will help me get an icon from blob in wx.python

I can do it from a file

ico = wx.Icon('bfgIcon.ico', wx.BITMAP_TYPE_ICO)
self.SetIcon(ico)

but I cannot seem to find the correct way of doing it from an sql blob. I've tried

row=uc.Users().GeneralImageRow('bfgLogo')
stream=wx.InputStream(StringIO(row[1])) 
image=stream.GetIcon()
self.SetIcon(image)

but I've clearly got the object architecture wrong

Can anyone please help?