__init__.py 文件源码

def verify_hub_empty():

    def format_listener(listener):
        return 'Listener %r for greenlet %r with run callback %r' % (
            listener, listener.greenlet, getattr(listener.greenlet, 'run', None))

    from eventlet import hubs
    hub = hubs.get_hub()
    readers = hub.get_readers()
    writers = hub.get_writers()
    num_readers = len(readers)
    num_writers = len(writers)
    num_timers = hub.get_timers_count()
    assert num_readers == 0 and num_writers == 0, \
        "Readers: %s (%d) Writers: %s (%d)" % (
            ', '.join(map(format_listener, readers)), num_readers,
            ', '.join(map(format_listener, writers)), num_writers,
        )