Log Message:
py-ipython: updated to 7.16.1

IPython 7.16
============

The default traceback mode will now skip frames that are marked with
``__tracebackhide__ = True`` and show how many traceback frames have been
skipped. This can be toggled by using :magic:`xmode` with the ``--show`` or
``--hide`` attribute. It will have no effect on non verbose traceback modes.

The ipython debugger also now understands ``__tracebackhide__`` as well and will
skip hidden frames when displaying. Movement up and down the stack will skip the
hidden frames and will show how many frames were hidden. Internal IPython frames
are also now hidden by default. The behavior can be changed with the
``skip_hidden`` while in the debugger, command and accepts "yes", \ 
"no", "true"
and "false" case insensitive parameters.

Misc Noticeable changes:
------------------------
- Exceptions are now (re)raised when running notebooks via the :magic:`%run`, \ 
helping to catch issues in workflows and
  pipelines. :ghpull:`12301`
- Fix inputhook for qt 5.15.0 :ghpull:`12355`
- Fix wx inputhook :ghpull:`12375`
- Add handling for malformed pathext env var (Windows) :ghpull:`12367`
- use $SHELL in system_piped :ghpull:`12360` for uniform behavior with
  ipykernel.