OSX中的jupyter内核：没有名为IPython的模块

Question

Quick side note :

This question is based on issue #7947 in ipython 's bug tracker. The problem seems to be an issue related to either OSX , or some weird settings on my mac (maybe both). I cannot reproduce it on a fresh Ubuntu box.

I am aware that the underlying problem could be complex. Knowing if it is reproducible on OSX or if it's just me would already be a great help.

---

I am trying to set up multiple jupyter kernels for my python versions. Specifically I have two conda environments sci27 and sci34 , as the names already suggest the former runs a python2.7 interpreter, the latter a python3.4 interpreter.

So what I do now is:

source activate sci27
conda install ipython-notebook
ipython kernelspec install-self

Now I have my kernel definition in /usr/local/share/jupyter/kernels/python2/

{
 "display_name": "Python 2",
 "language": "python",
 "argv": [
  "/Users/ch/miniconda/envs/sci27/bin/python",
  "-m",
  "IPython.kernel",
  "-f",
  "{connection_file}"
 ]
}

I start ipython in my sci34 environment:

source activate sci34
conda install ipython-notebook
ipython notebook --debug

And now things are getting weird: If I select the freshly installed kernel Python 2 , the kernel crashes with following output:

[D 12:47:53.029 NotebookApp] Opening websocket /api/kernels/4ae0a266-9396-44f7-a529-912056dc6eed/channels
[D 12:47:53.029 NotebookApp] Connecting to: tcp://127.0.0.1:52954
[D 12:47:53.030 NotebookApp] Connecting to: tcp://127.0.0.1:52955
[D 12:47:53.031 NotebookApp] Connecting to: tcp://127.0.0.1:52956
[I 12:47:54.949 NotebookApp] KernelRestarter: restarting kernel (4/5)
WARNING:root:kernel 4ae0a266-9396-44f7-a529-912056dc6eed restarted
[D 12:47:54.954 NotebookApp] Connecting to: tcp://127.0.0.1:52957
/Users/ch/miniconda/envs/sci34/bin/python: No module named IPython
[W 12:47:57.957 NotebookApp] KernelRestarter: restart failed
[W 12:47:57.957 NotebookApp] Kernel 4ae0a266-9396-44f7-a529-912056dc6eed died, removing from map.
ERROR:root:kernel 4ae0a266-9396-44f7-a529-912056dc6eed restarted failed!
[W 12:47:57.975 NotebookApp] Kernel deleted before session
[W 12:47:57.975 NotebookApp] 410 DELETE /api/sessions/70f4d715-807c-4bbc-8a0a-b503aa966606 (::1) 1.40ms referer=http://localhost:8888/notebooks/Untitled2.ipynb?kernel_name=python2

The message /Users/ch/miniconda/envs/sci34/bin/python: No module named IPython is rather surprising to me. Why would jupyter try to call sci34 's interpreter instead of sci27 's interpreter?

Also, why the module not found message? Obviously /Users/ch/miniconda/envs/sci34/bin/python -m IPython works perfectly fine, as the notebook server runs from the sci34 environment.

Answer 1

Updating to IPython 3.2.0 will fix this issue. For details see pull request PR-8527 .