A virtual for pyparsing has been added. Please update net-mathematics/pulp in science overlay to use it. Thanks.
+*pulp-1.5.3 (14 Jan 2013) + + 14 Jan 2013; Justin Lecher <jlec@gentoo.org> -pulp-1.4.9.ebuild, + +pulp-1.5.3.ebuild, metadata.xml: + Move to EAPI=5, distutils-r1.eclass and virtual/pyparsing, #449564; unbundle + sci-libs/coinor-cbc +