.. _version 8.21:

IPython 8.21

More substantial release of IPython slightly out of schedule as it was not

possible for me to make a release last Friday.

Few new features are present, but the codebase has been cleaned, and a couple

of API are _considered_ for deprecation. They are not deprecated yet, but as

they do not seem to be quite used, they may emit a warning, in which case please

comment on the relevant issue to inform me of _which_ project use those feature

and how you use them. Depending on the feedback I might change the timeline for

deprecation.

This release saw 14 PRs, with more outside contribution than usual,

I'll note in particular PRs related to making IPython work on emscripten.

I also want to point that we are _trying_ to keep compatibility with Python 3.13,

but it's a cat and mouse game. Plus I am low on time, so I would appreciate any

help with that.

Deprecations

- :ghpull:`14307` Pending Deprecation of

``ColorSchemeTable.set_active_scheme(...)``'s ``case_sensitive`` Parameter.

- :ghpull:`14305` Pending Deprecation of constructing ``ColorScheme`` via

``kwargs``, in favor passing a single dict.

Fixes

- :ghpull:`14284` TerminalIPythonApp's would warn that ``auto_create`` option is not

recognized.

- :ghpull:`14286` Fix a crash with ``NotOneValueFound`` when rendering complex

tracebacks.

- :ghpull:`14287` Partial Python 3.13 compatibility

- :ghpull:`14290` Docs/Typos.

Changes

- :ghpull:`14289` ``ipdb.set_trace()`` now accepts ``header=`` for better

compatibility with ``pdb.set_trace()``

- :ghpull:`14300` and :ghpull:`14301` Add hooking ability to produce

mimebundle.

We'll outline :ghpull:`14300`, it is now possible to extend the ``?/??``

operator to return more mimetypes to render richer help in frontends that

support it. In particular you could send a json representation of the help that

could be displayed in a customizable way.

Miscellaneous

- :ghpull:`14291` Misc Refactor of Color handling

- :ghpull:`14295` Misc test skip on problematic Pypy versions.

Thanks

Special thanks to all our contributors, and to the Pypy team that was extremely

reactive in helping to investigate a fixing a rare unicode+windows bug.

As usual you can find the full list of PRs on GitHub under `the 8.21

<https://github.com/ipython/ipython/milestone/128?closed=1>`__ milestone.

Thanks to the `D. E. Shaw group <https://deshaw.com/>`__ for sponsoring

work on IPython and related libraries.