The ipython3 programs fails to start:

lovells@ron5tum:~$ ipython3
Traceback (most recent call last):
  File "/usr/bin/ipython3", line 4, in <module>
    from IPython import start_ipython
  File "/usr/lib/python3.6/site-packages/IPython/__init__.py", line 55, in
<module>
    from .terminal.embed import embed
  File "/usr/lib/python3.6/site-packages/IPython/terminal/embed.py", line 16,
in <module>
    from IPython.terminal.interactiveshell import TerminalInteractiveShell
  File "/usr/lib/python3.6/site-packages/IPython/terminal/interactiveshell.py",
line 22, in <module>
    from prompt_toolkit.shortcuts import create_prompt_application,
create_eventloop, create_prompt_layout, create_output
ImportError: cannot import name 'create_prompt_application'

It appears that python3-prompt_toolkit 2.0.4-1.1 is incompatible with the
current python3-jupyter_ipython 6.4.0-1.4.

On my other Linux installations (Sid and Rawhide), both using
python3-prompt_toolkit 1.0.15, IPython/terminal/interactiveshell.py imports
function create_prompt_application() from prompt_toolkit/shortcuts.py. In
Tumbleweed snapshot 20180726, there is no shortcuts.py, and
prompt_toolkit/shortcuts/ is a directory. There is no module
create_prompt_application under it, nor is the function
create_prompt_application defined in prompt_toolkit/__init__.py nor
prompt_toolkit/shortcupts/__init__.py.

According to https://python-prompt-toolkit.readthedocs.io/en/master/, the
prompt_toolit 2.0 branch is incompatible with the 1.0 branch, requiring
application changes.

Was the 2.0.4 upgrade getting ahead of ourselves, at least with respect to
IPython?