Python. This is so we can ensure we get a copy of the data objects
when needed instead of just a reference to a data object within
another that may get deleted unexpectedly.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27681 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775