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[3.12] gh-102778: update documentation of PyErr_PrintEx and traceback.print_last() regarding sys.last_exc (GH-105190) #105246

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Jun 2, 2023
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[3.12] gh-102778: update documentation of PyErr_PrintEx and traceback.print_last() regarding sys.last_exc (GH-105190) #105246

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11 changes: 8 additions & 3 deletions Doc/c-api/exceptions.rst
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Expand Up @@ -60,9 +60,14 @@ Printing and clearing
Call this function **only** when the error indicator is set. Otherwise it
will cause a fatal error!

If *set_sys_last_vars* is nonzero, the variables :data:`sys.last_type`,
:data:`sys.last_value` and :data:`sys.last_traceback` will be set to the
type, value and traceback of the printed exception, respectively.
If *set_sys_last_vars* is nonzero, the variable :data:`sys.last_exc` is
set to the printed exception. For backwards compatibility, the
deprecated variables :data:`sys.last_type`, :data:`sys.last_value` and
:data:`sys.last_traceback` are also set to the type, value and traceback
of this exception, respectively.

.. versionchanged:: 3.12
The setting of :data:`sys.last_exc` was added.


.. c:function:: void PyErr_Print()
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7 changes: 3 additions & 4 deletions Doc/library/traceback.rst
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Expand Up @@ -86,10 +86,9 @@ The module defines the following functions:

.. function:: print_last(limit=None, file=None, chain=True)

This is a shorthand for ``print_exception(sys.last_type, sys.last_value,
sys.last_traceback, limit, file, chain)``. In general it will work only
after an exception has reached an interactive prompt (see
:data:`sys.last_type`).
This is a shorthand for ``print_exception(sys.last_exc, limit, file,
chain)``. In general it will work only after an exception has reached
an interactive prompt (see :data:`sys.last_exc`).


.. function:: print_stack(f=None, limit=None, file=None)
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