This will ease the transition as dnspython is stabilized.
Bug: https://bugs.gentoo.org/597024
Package-Manager: Portage-2.3.5_p32, Repoman-2.3.2_p62
--- /dev/null
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+PYTHON_COMPAT=( python{2_7,3_4,3_5,3_6} )
+
+inherit python-r1
+
+DESCRIPTION="A virtual for dnspython, for Python 2 & 3"
+SLOT="0"
+KEYWORDS="~alpha amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~s390 ~sh ~sparc x86 ~amd64-linux ~x86-linux"
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
+
+RDEPEND=">=dev-python/dnspython-1.15.0:0[${PYTHON_USEDEP}]"