当Exchange对象的类型为“直接”时，无法从队列接收消息

Question

当我将“直接”类型更改为“扇出”或“主题”时，这是可行的。但是，“直接”类型却无效。

• 我按照官方网站的例子写信。
• 然后我尝试删除代码=>“从未来 import absolute_import，unicode_literals”中删除代码。

---

• queues.py
  • 如果我将类型更改为“扇出”或“主题”，那是可行的。

from __future__ import absolute_import, unicode_literals

from kombu import Queue, Exchange

exchange = Exchange('demo_exchange', type='topic')
demo_queues = [
    Queue('one', exchange, routing_key='o'),
    Queue('two', exchange, routing_key='t'),
    Queue('three', exchange, routing_key='th'),
]

• worker.py

from __future__ import absolute_import, unicode_literals

from kombu.mixins import ConsumerMixin
from kombu import Connection

from queues import demo_queues

class Worker(ConsumerMixin):

    def __init__(self, connection):
        self.connection = connection

    def get_consumers(self, Consumer, channel):
        return [Consumer(queues=demo_queues, accept=['pickle', 'json'], callbacks=[self.on_task])]

    def on_task(self, body, message):
        args = body['args']
        func = body['func']
        print(args, func)

        func()
        message.ack()

if __name__ == '__main__':
    with Connection('redis://localhost:6379/0') as conn:
        try:
            worker = Worker(conn)
            worker.run()
        except KeyboardInterrupt:
            print('bye')

• client.py

from __future__ import absolute_import, unicode_literals

from kombu.pools import producers

from queues import exchange

priority_to_routing_key = {
    'high': 'o',
    'mid': 't',
    'low': 'th',
}


def send_tasks(conn, func, args, priority='high'):
    data = {'func': func, 'args': args}

    with producers[conn].acquire(block=True) as producer:
        routing_key = priority_to_routing_key[priority]
        producer.publish(data,
                         serializer='pickle',
                         exchange=exchange,
                         declare=[exchange],
                         routing_key=routing_key)


if __name__ == '__main__':
    from kombu import Connection
    from tasks import func_task

    connection = Connection('redis://localhost:6379/0')
    send_tasks(connection, func=func_task, args=('test hello'), priority='mid')

• tasks.py

def func_task(n='hello'):
    print(n, '---====')

我希望解决这个问题。