Traceback (most recent call last):
  File "/home/oub/.emacs.d/elpa/ob-ipython-20180224.153/client.py", line 1, in <module>
    import jupyter_client as client
  File "/usr/local/lib/python3.6/dist-packages/jupyter_client/__init__.py", line 6, in <module>
    from .asynchronous import AsyncKernelClient  # noqa
  File "/usr/local/lib/python3.6/dist-packages/jupyter_client/asynchronous/__init__.py", line 1, in <module>
    from .client import AsyncKernelClient  # noqa
  File "/usr/local/lib/python3.6/dist-packages/jupyter_client/asynchronous/client.py", line 6, in <module>
    from jupyter_client.channels import HBChannel
  File "/usr/local/lib/python3.6/dist-packages/jupyter_client/channels.py", line 15, in <module>
    from .session import Session
  File "/usr/local/lib/python3.6/dist-packages/jupyter_client/session.py", line 52, in <module>
    from jupyter_client.jsonutil import extract_dates
  File "/usr/local/lib/python3.6/dist-packages/jupyter_client/jsonutil.py", line 15, in <module>
    from dateutil.parser import parse as _dateutil_parse  # type: ignore
  File "/usr/lib/python3/dist-packages/dateutil/parser.py", line 25, in <module>
    from six import text_type, binary_type, integer_types
ModuleNotFoundError: No module named 'six'