Opposite of yield?

[achrist at easystreet.com]

The yield statement looks to be a big step toward some kind of
lightweight concurrency-oriented programming in python.  Is there
any similarly nice way to do the opposite of yield, just sit around
(perhaps in the middle of a loop) and wait until some other routine
(unknown to the waiting module) hurls a value in?

If this is not implemented now, is there any chance that it's on the
list of things to come?


Al