Here is updated patch. Now the repr always starts with the qualified class name.

<threading.Semaphore: 10 at 0xb710ec8c>
<threading.BoundedSemaphore: 7/10 at 0xb6ff1d6c>
<threading.Event: unset at 0xb710ec8c>
<threading.Event: set at 0xb710ec8c>
<threading.Barrier: 0/10 at 0xb6ff1d6c>
<threading.Barrier: 3/10 at 0xb6ff1d6c>
<threading.Barrier: 0/10, broken at 0xb6ff1d6c>

But there is other question. Should reprs be consistent with reprs of corresponding classes in multiprocessing and asyncio modules?

In multiprocessing:

<Semaphore(value=10)>
<BoundedSemaphore(value=10, maxvalue=10)>

In asyncio:

<asyncio.locks.Event object at 0xb6fa180c [unset]>
<asyncio.locks.Event object at 0xb6fa180c [set]>
<asyncio.locks.Event object at 0xb6fa180c [unset,waiters:3]>
<asyncio.locks.Semaphore object at 0xb6cec26c [unlocked,value:10]>
<asyncio.locks.Semaphore object at 0xb6cec26c [locked]>
<asyncio.locks.Semaphore object at 0xb6cec26c [locked, waiters:3]>