[New-bugs-announce] [issue36164] Updating Py_InspectFlag programmatically

[Atsuo Ishimoto]

New submission from Atsuo Ishimoto <ishimoto at python.jp>:

I sometime use a hack to start interactive console after running script.

.. code-block:: python

   import os

   os.environ['PYTHONINSPECT'] = 'x'
   print("Hello")

This hack works because ``PYTHONINSPECT`` is checked `here <https://github.com/python/cpython/blob/master/Modules/main.c#L738>`__ when exiting Python.

However, if the script uses ``sys.exit()`` to exit from Python, interactive console doen't apper because unhandled ``SystemExit`` exception leads ``exit()`` call to kill process, without checking ``PYTHONINSPECT``.

.. code-block:: python

   import os, sys

   os.environ['PYTHONINSPECT'] = 'x'
   print("Hello")

   sys.exit(1)  # Interactive console will not start


I think feature to allow updating ``Py_InspectFlag`` is useful, and this is a bugs to be fixed. However, setting environment variable to start console is not intuituve.

So instead of fixing bug, I would like to propose a small function to set ``Py_InspectFlag`` to start interactive console after running script.

.. code-block:: python

    sys.setinteractiveflag(bool)

Thoughts?

----------
components: Interpreter Core
messages: 336993
nosy: ishimoto
priority: normal
severity: normal
status: open
title: Updating Py_InspectFlag programmatically
type: behavior

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36164>
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