> It would be for waiting for several conditions associated with the 
> same lock, not for waiting for several locks.

A Condition uses a 2 lock mechanism: 
  - outer lock: one for all the waiters to access the Condition object 
  - inner lock: one for each waiter to wait on.

You cannot associate several conditions to the *inner lock*, because you don't have access to them (otherwise I wouldn't open this issue).
You said you want to have several conditions on the lock passed by the user:

    lock = Lock()
    cond1 = Condition(lock)
    cond2 = Condition(lock)
    Condition.wait_for_any({cond1: foo, cond2: bar})

but because this "lock" object is not the one the thread is waiting on, it won't work.


> There is always a need for a predicate function.

You may not need to test for a predicate when using .wait() . Only when you're using .wait_for()
This is what I'm most interested in mimicking.