def pack(window, sizer, expand=1.1):
    """simple wxPython pack function"""
    tsize = window.GetSize()
    msize = window.GetMinSize()
    window.SetSizer(sizer)
    sizer.Fit(window)
    nsize = 10 * int(expand * (max(msize[0], tsize[0]) / 10)), 10 * int(
        expand * (max(msize[1], tsize[1]) / 10.0))
    window.SetSize(nsize)
