a.rb

In [1]: import IPython.html; print(IPython.html)
/home/epinux/dev/ipython/IPython/html.py:14: ShimWarning: The `IPython.html` package has been deprecated. You should import from `notebook` instead. `IPython.html.widgets` has moved to `ipywidgets`.
  "`IPython.html.widgets` has moved to `ipywidgets`.", ShimWarning)
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-8820782fc23d> in <module>()
----> 1 import IPython.html; print(IPython.html)

/usr/lib/python3.5/importlib/_bootstrap.py in _module_repr(module)

/home/epinux/dev/ipython/IPython/utils/shimmodule.py in __spec__(self)
     70     def __spec__(self):
     71         """Don't produce __spec__ until requested"""
---> 72         return __import__(self._mirror).__spec__
     73 
     74     def __dir__(self):

/usr/local/lib/python3.5/dist-packages/notebook/__init__.py in <module>()
     23 del os
     24 
---> 25 from .nbextensions import install_nbextension
     26 from ._version import version_info, __version__

/usr/local/lib/python3.5/dist-packages/notebook/nbextensions.py in <module>()
     21     from urllib import urlretrieve
     22 
---> 23 from jupyter_core.paths import (
     24     jupyter_data_dir, jupyter_config_dir, jupyter_config_path,
     25     SYSTEM_JUPYTER_PATH, ENV_JUPYTER_PATH, ENV_CONFIG_PATH, SYSTEM_CONFIG_PATH

ImportError: No module named 'jupyter_core'

In [2]: