There's a bunch of python_* functions there but nothing is calling them. I have no clue what newt was supposed to install but I honestly doubt it does what the author thinks it does.
@@ -4,0 +5,3 @@ + 04 Mar 2014; Naohiro Aota <naota@gentoo.org> newt-0.52.15.ebuild: + Update to use python-r1 properly #502960 +