Hello,

In a few days, USE={python,perl} will be removed from the profile
defaults. There has been sufficient levels of testing so the impact to
users will be small besides a potentially large number of rebuilds
which should not be a cause for alarm. The end result will be
beneficial for a vast majority of people.

See further reading:
http://archives.gentoo.org/gentoo-dev-announce/msg_ae405bb743eeda9dc66773998ee50759.xml

Thanks,
Jeremy