Nothing more to say, really. Just see the URL.
eix pypy * dev-python/pypy Available versions: ~2.3.1-r2(0/2.3) ~2.4.0(0/2.4) ~2.5.1(0/2.5) [M]~2.6.0(0/2.6) {bzip2 doc gdbm +jit low-memory ncurses sandbox shadowstack sqlite test tk CPU_FLAGS_X86="sse2"} Homepage: http://pypy.org/ Description: A fast, compliant alternative implementation of the Python language * dev-python/pypy-bin Available versions: ~2.3.1-r2(0/2.3) ~2.4.0(0/2.4) ~2.5.1(0/2.5) [M]~2.6.0(0/2.6) {doc gdbm +jit shadowstack sqlite test tk CPU_FLAGS_X86="sse2"} Homepage: http://pypy.org/ Description: A fast, compliant alternative implementation of the Python language (binary package) It's already there. Or are you talking about pypy3?
One 'emerge --sync' away. Sorry for the bugspam.