I believe that the solution to the problem of python-wxgtk2.6 is this ...
To install the units example (python-wxgtk2.8…) add these lines to your sources.list
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Deb http://download.tuxfamily.org/3v1deb edgy 3v1n0
Deb-src http://download.tuxfamily.org/3v1deb edgy 3v1n0
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this is the answer in debian but it should work in dreamlinux. i am not sure that it works but try it
-- Henry Antonio --