Only in lash.orig/: ChangeLog
diff -ur lash.orig//lash-0.5.4-r1.ebuild lash/lash-0.5.4-r1.ebuild
--- lash.orig//lash-0.5.4-r1.ebuild	2011-03-29 15:01:17.000000000 +0800
+++ lash/lash-0.5.4-r1.ebuild	2011-11-28 03:12:13.919985349 +0800
@@ -2,9 +2,9 @@
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/media-sound/lash/lash-0.5.4-r1.ebuild,v 1.12 2011/03/29 06:56:34 radhermit Exp $
 
-EAPI=2
-
-inherit eutils libtool
+EAPI=3
+PYTHON_DEPEND="python? 2"
+inherit eutils libtool python
 
 DESCRIPTION="LASH Audio Session Handler"
 HOMEPAGE="http://www.nongnu.org/lash/"
@@ -14,17 +14,24 @@
 SLOT="0"
 KEYWORDS="alpha amd64 hppa ppc ppc64 sparc x86"
 IUSE="alsa debug gtk python"
+DOCS=( AUTHORS ChangeLog NEWS README TODO )
 
 RDEPEND="alsa? ( media-libs/alsa-lib )
 	media-sound/jack-audio-connection-kit
 	dev-libs/libxml2
 	gtk? ( x11-libs/gtk+:2 )
-	python? ( dev-lang/python )
 	|| ( sys-libs/readline dev-libs/libedit )"
 DEPEND="${RDEPEND}
 	dev-util/pkgconfig
 	python? ( >=dev-lang/swig-1.3.31 )"
 
+pkg_setup() {
+	if use python; then
+		python_set_active_version 2
+		python_pkg_setup
+	fi
+}
+
 src_prepare() {
 	epatch "${FILESDIR}/${P}-glibc2.8.patch"
 	elibtoolize
@@ -45,7 +52,21 @@
 }
 
 src_install() {
-	emake DESTDIR="${D}" install || die
+	emake DESTDIR="${D}" install
+	dodoc ${DOCS[@]}
+	if use python; then
+		python_clean_installation_image
+	fi
+}
+
+pkg_postinst() {
+	if use python; then
+		python_mod_optimize lash.py
+	fi
+}
 
-	dodoc AUTHORS ChangeLog NEWS README TODO
+pkg_postrm() {
+	if use python; then
+		python_mod_cleanup lash.py
+	fi
 }