在virtualenv中运行"jupyter notebook"返回AttributeError

Question

我在python3中的virtualenv中使用pip安装了jupyter.在跑步时:

jupyter notebook

我得到以下错误

    File "<path>/ss/bin/jupyter-notebook", line 7, in <module>
    from notebook.notebookapp import main
  File "<path>/ss/lib/python3.4/site-packages/notebook/notebookapp.py", line 44, in <module>
    from zmq.eventloop import ioloop
  File "<path>/ss/lib/python3.4/site-packages/zmq/eventloop/__init__.py", line 3, in <module>
    from zmq.eventloop.ioloop import IOLoop
  File "<path>/ss/lib/python3.4/site-packages/zmq/eventloop/ioloop.py", line 78, in <module>
    while _IOLoop.configurable_default() is not _IOLoop:
  File "<path>/ss/lib/python3.4/site-packages/tornado/ioloop.py", line 350, in configurable_default
    from tornado.platform.asyncio import AsyncIOLoop
  File "<path>/ss/lib/python3.4/site-packages/tornado/platform/asyncio.py", line 25, in <module>
    from tornado.gen import convert_yielded
  File "<path>/ss/lib/python3.4/site-packages/tornado/gen.py", line 1295, in <module>
    _wrap_awaitable = asyncio.ensure_future
AttributeError: 'module' object has no attribute 'ensure_future'

我使用将每个依赖模块升级到其最新版本

- 升级

但它仍然给我同样的错误.

Answer 1

我通过将tornado软件包降级到4.5版来解决这个问题:

pip install tornado==4.5

当我在我的虚拟环境中使用pip安装ipykernel时,它会自动安装tornado作为最新版本.但是,我认为最新版龙卷风与python版本低于3.4.4导致错误.

所以,我删除了龙卷风并用4.5版重新安装(此版本安装在我的其他虚拟环境中.)