Redirect imports for extensions. This module basically makes it possible for us to transition from ytext.foo to ytext_foo without having to force all extensions to upgrade at the same time.
When a user does
from yt.extensions.foo import bar it will attempt to
from yt_foo import bar first and when that fails it will
try to import
from ytext.foo import bar.
We’re switching from namespace packages because it was just too painful for everybody involved.
2015 by Armin Ronacher.
BSD, see LICENSE for more details.