无法在 Jupyter 中并行导入 IPython

Question

我最近将 IPython 更新到 4.0.0 并安装了 Jupyter 4.0.6。

我想用Ipython并行，在notebook中启动引擎后，我导入了：

from IPython import parallel

它失败了：

~/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/IPython/utils/traitlets.py:5: UserWarning: IPython.utils.traitlets has moved to a top-level traitlets package.
  warn("IPython.utils.traitlets has moved to a top-level traitlets package.")
~/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/IPython/utils/pickleutil.py:3: UserWarning: IPython.utils.pickleutil has moved to ipykernel.pickleutil
  warn("IPython.utils.pickleutil has moved to ipykernel.pickleutil")
~/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/IPython/utils/jsonutil.py:3: UserWarning: IPython.utils.jsonutil has moved to jupyter_client.jsonutil
  warn("IPython.utils.jsonutil has moved to jupyter_client.jsonutil")
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-5652e9e33a4d> in <module>()
----> 1 from IPython import parallel

~/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/IPython/parallel/__init__.py in <module>()
     31 
     32 from .client.asyncresult import *
---> 33 from .client.client import Client
     34 from .client.remotefunction import *
     35 from .client.view import *

~/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/IPython/parallel/client/client.py in <module>()
     38 from IPython.utils.capture import RichOutput
     39 from IPython.utils.coloransi import TermColors
---> 40 from IPython.utils.jsonutil import rekey, extract_dates, parse_date
     41 from IPython.utils.localinterfaces import localhost, is_local_ip
     42 from IPython.utils.path import get_ipython_dir

ImportError: cannot import name rekey

所以我尝试了：

pip install rekey

但没有找到分布。

请注意，它在笔记本中以相同的方式失败，无论是使用ipython notebook 或jupyter notebook 打开，还是在控制台中。

还要注意有一个警告：

UserWarning: IPython.utils.jsonutil has moved to jupyter_client.jsonutil

但是rekey在模块jupyter_client.jsonutil中不存在

问题：如何让 IPython 并行工作以在 Jupyter 中工作？ 我错过了什么？

Answer 1

我发现了我认为的问题（至少它有效）：

• 首先，我必须import ipyparallel 而不是IPython.parallel 见这里：http://jupyter.readthedocs.org/en/latest/migrating.html#imports

---

编辑：我得到了这个 OSError，但修复显然没用，没有它也可以工作。不过，我仍然不明白为什么会出现此错误。

• 然后，我在启动客户端时遇到了另一个错误：

  OSError: Connection file '~/.ipython/profile_default/security/ipcontroller-client.json' not found.
  You have attempted to connect to an IPython Cluster but no Controller could be found.
  Please double-check your configuration and ensure that a cluster is running.
  

所以我只是将目录~/.ipython/profile_default复制到~/.jupyter/profile_default

它有效！