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gh-111201: A new Python REPL (GH-111567)

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Co-authored-by: Łukasz Langa <lukasz@langa.pl>
Co-authored-by: Marta Gómez Macías <mgmacias@google.com>
Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
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Doc/tutorial/appendix.rst
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@ -10,6 +10,28 @@ Appendix
Interactive Mode
================
There are two variants of the interactive :term:`REPL`. The classic
basic interpreter is supported on all platforms with minimal line
control capabilities.
On Unix-like systems (e.g. Linux or macOS) with :mod:`curses` and
:mod:`readline` support, a new interactive shell is used by default.
This one supports color, multiline editing, history browsing, and
paste mode. To disable color, see :ref:`using-on-controlling-color` for
details. Function keys provide some additional functionality.
:kbd:`F1` enters the interactive help browser :mod:`pydoc`.
:kbd:`F2` allows for browsing command-line history without output nor the
:term:`>>>` and :term:`...` prompts. :kbd:`F3` enters "paste mode", which
makes pasting larger blocks of code easier. Press :kbd:`F3` to return to
the regular prompt.
When using the new interactive shell, exit the shell by typing :kbd:`exit`
or :kbd:`quit`. Adding call parentheses after those commands is not
required.
If the new interactive shell is not desired, it can be disabled via
the :envvar:`PYTHON_BASIC_REPL` environment variable.
.. _tut-error:
Error Handling