

def run(root_coro):
    'Schedules a coroutine, running it to completion. This\n    encapsulates the Bluelet scheduler, which the root coroutine can\n    add to by spawning new coroutines.\n    '
    threads = {
        root_coro: ValueEvent(None),
    }
    delegators = {
        
    }
    joiners = collections.defaultdict(list)

    def complete_thread(coro, return_value):
        'Remove a coroutine from the scheduling pool, awaking\n        delegators and joiners as necessary and returning the specified\n        value to any delegating parent.\n        '
        del threads[coro]
        if (coro in delegators):
            threads[delegators[coro]] = ValueEvent(return_value)
            del delegators[coro]
        if (coro in joiners):
            for parent in joiners[coro]:
                threads[parent] = ValueEvent(None)
            del joiners[coro]

    def advance_thread(coro, value, is_exc=False):
        'After an event is fired, run a given coroutine associated with\n        it in the threads dict until it yields again. If the coroutine\n        exits, then the thread is removed from the pool. If the coroutine\n        raises an exception, it is reraised in a ThreadException. If\n        is_exc is True, then the value must be an exc_info tuple and the\n        exception is thrown into the coroutine.\n        '
        try:
            if is_exc:
                next_event = coro.throw(*value)
            else:
                next_event = coro.send(value)
        except StopIteration:
            complete_thread(coro, None)
        except:
            del threads[coro]
            raise ThreadException(coro, sys.exc_info())
        else:
            if isinstance(next_event, types.GeneratorType):
                next_event = DelegationEvent(next_event)
            threads[coro] = next_event

    def kill_thread(coro):
        'Unschedule this thread and its (recursive) delegates.\n        '
        coros = [coro]
        while isinstance(threads[coro], Delegated):
            coro = threads[coro].child
            coros.append(coro)
        for coro in reversed(coros):
            complete_thread(coro, None)
    exit_te = None
    while threads:
        try:
            while True:
                have_ready = False
                for (coro, event) in list(threads.items()):
                    if isinstance(event, SpawnEvent):
                        threads[have_ready.spawned] = ValueEvent(None)
                        advance_thread(coro, None)
                        have_ready = True
                    elif isinstance(event, ValueEvent):
                        advance_thread(coro, event.value)
                        have_ready = True
                    elif isinstance(event, ExceptionEvent):
                        advance_thread(coro, event.exc_info, True)
                        have_ready = True
                    elif isinstance(event, DelegationEvent):
                        threads[coro] = Delegated(event.spawned)
                        threads[event.spawned] = ValueEvent(None)
                        delegators[event.spawned] = coro
                        have_ready = True
                    elif isinstance(event, ReturnEvent):
                        complete_thread(coro, event.value)
                        have_ready = True
                    elif isinstance(event, JoinEvent):
                        threads[coro] = SUSPENDED
                        joiners[event.child].append(coro)
                        have_ready = True
                    elif isinstance(event, KillEvent):
                        threads[coro] = ValueEvent(None)
                        kill_thread(event.child)
                        have_ready = True
                if (not have_ready):
                    break
            event2coro = dict(((v, k) for (k, v) in threads.items()))
            for event in _event_select(threads.values()):
                try:
                    value = event.fire()
                except socket.error as exc:
                    if (isinstance(exc.args, tuple) and (exc.args[0] == errno.EPIPE)):
                        pass
                    else:
                        traceback.print_exc()
                    threads[event2coro[event]] = ReturnEvent(None)
                else:
                    advance_thread(event2coro[event], value)
        except ThreadException as te:
            event = ExceptionEvent(te.exc_info)
            if (te.coro in delegators):
                threads[delegators[te.coro]] = event
                del delegators[te.coro]
            else:
                exit_te = te
                break
        except:
            threads = {
                root_coro: ExceptionEvent(sys.exc_info()),
            }
    for coro in threads:
        coro.close()
    if exit_te:
        exit_te.reraise()

dataset/ETHPy150Open beetbox/beets/beets/util/bluelet.py run/VarMisuse@367/772 `event`->`have_ready`