Python 芹菜错误'；无此类传输：amqp'；

芹菜很好用，有一天命令行工作人员无法启动以下跟踪：

Traceback (most recent call last):
  File "/home/buildslave/venv/bin/celery", line 9, in <module>
    load_entry_point('celery==3.0.7', 'console_scripts', 'celery')()
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/__main__.py", line 14, in main
    main()
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 942, in main
    cmd.execute_from_commandline(argv)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 886, in execute_from_commandline
    super(CeleryCommand, self).execute_from_commandline(argv)))
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/base.py", line 175, in execute_from_commandline
    return self.handle_argv(prog_name, argv[1:])
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 881, in handle_argv
    return self.execute(command, argv)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 856, in execute
    return cls(app=self.app).run_from_argv(self.prog_name, argv)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 142, in run_from_argv
    return self(*args, **options)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 112, in __call__
    ret = self.run(*args, **kwargs)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celery.py", line 214, in run
    return self.target.run(*args, **kwargs)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/bin/celeryd.py", line 153, in run
    return self.app.Worker(**kwargs).run()
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/apps/worker.py", line 167, in run
    print(str(self.colored.cyan(' \n', self.startup_info())) +
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/celery/apps/worker.py", line 234, in startup_info
    'conninfo': self.app.connection().as_uri(),
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 445, in as_uri
    fields = self.info()
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 434, in info
    return OrderedDict(self._info())
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 413, in _info
    D = self.transport.default_connection_params
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 636, in transport
    self._transport = self.create_transport()
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 395, in create_transport
    return self.get_transport_cls()(client=self)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/connection.py", line 402, in get_transport_cls
    transport_cls = get_transport_cls(transport_cls)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/transport/__init__.py", line 110, in get_transport_cls
    _transport_cache[transport] = _get_transport_cls(transport)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/transport/__init__.py", line 92, in _get_transport_cls
    transport_module_name, transport_cls_name = resolve_transport(transport)
  File "/home/buildslave/venv/local/lib/python2.7/site-packages/kombu/transport/__init__.py", line 87, in resolve_transport
    raise KeyError('No such transport: %s' % (transport, ))
KeyError: 'No such transport: amqp'

回溯（最近一次呼叫最后一次）：
文件“/home/buildslave/venv/bin/芹菜”，第9行，在
加载入口点（“芹菜==3.0.7”，“控制台脚本”，“芹菜”）（）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/cellery/______.py”，第14行，在main中
main（）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celery.py”，第942行，在main中
cmd.从命令行（argv）执行命令
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celery.py”，第886行，从命令行执行
超级（CeleryCommand，self）。从命令行（argv）执行命令）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/芹菜/bin/base.py”，第175行，从命令行执行
返回self.handle_argv（程序名，argv[1:]）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celery.py”，第881行，在handle_argv中
返回self.execute（命令，argv）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celery.py”，执行中的第856行
返回cls（app=self.app）。从_argv（self.prog_name，argv）运行_
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celery.py”，第142行，从_argv运行
返回自我（*参数，**选项）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celery.py”，第112行，在调用中__
ret=self.run（*args，**kwargs）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celery.py”，第214行，正在运行
返回self.target.run（*args，**kwargs）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/celery/bin/celeryd.py”，第153行，正在运行
返回self.app.Worker（**kwargs.run（））
文件“/home/buildslave/venv/local/lib/python2.7/site packages/芹菜/apps/worker.py”，第167行，正在运行
打印（str（self.colored.cyan（'\n'，self.startup\u info（）））+
文件“/home/buildslave/venv/local/lib/python2.7/site packages/芹菜/apps/worker.py”，第234行，在启动信息中
'conninfo'：self.app.connection（）.as_uri（），
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/connection.py”，第445行，在as_uri中
fields=self.info（）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/connection.py”，信息中第434行
退货订单信息（self.\u info（））
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/connection.py”，第413行，在
D=self.transport.default\u connection\u参数
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/connection.py”，第636行，运输中
self.\u transport=self.create\u transport（）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/connection.py”，第395行，在create_transport中
返回self.get_transport_cls（）（client=self）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/connection.py”，第402行，在get_transport_cls中
交通工具=获取交通工具（交通工具）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/transport/_init__.py”，第110行，在get_transport_cls中
_传输缓存[传输]=\u获取\u传输\u cls（传输）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/transport/___________.py”，第92行，in_get_transport_cls
传输\模块\名称，传输\ cls \名称=解析\传输（传输）
文件“/home/buildslave/venv/local/lib/python2.7/site packages/kombu/transport/_init__.py”，第87行，在resolve_transport中
raise KeyError（'没有这样的传输：%s'（传输，））
KeyError:'没有这样的传输：amqp'

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通过代码追踪发现，kombu.transport.transport\u别名中神秘地缺少了“amqp”——但这就是我失去线索的地方。

问题似乎是由于升级到芹菜3.0.7。以下为我解决了问题：

pip install kombu==2.4.0

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注意：这似乎已由kombu==2.4.3 per解决，我似乎已在kombu中找到导致此特定问题的提交：init-py-P33