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[3.10] bpo-44964: Correct the note about the f_lasti field (GH-28208) #28276

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ambv merged 1 commit into from
Sep 10, 2021
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[3.10] bpo-44964: Correct the note about the f_lasti field (GH-28208) #28276

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5 changes: 2 additions & 3 deletions Doc/reference/datamodel.rst
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Expand Up @@ -1034,9 +1034,8 @@ Internal types
:attr:`f_code` is the code object being executed in this frame; :attr:`f_locals`
is the dictionary used to look up local variables; :attr:`f_globals` is used for
global variables; :attr:`f_builtins` is used for built-in (intrinsic) names;
:attr:`f_lasti` gives the precise instruction (it represents a wordcode index, which
means that to get an index into the bytecode string of the code object it needs to be
multiplied by 2).
:attr:`f_lasti` gives the precise instruction (this is an index into the
bytecode string of the code object).

Accessing ``f_code`` raises an :ref:`auditing event <auditing>`
``object.__getattr__`` with arguments ``obj`` and ``"f_code"``.
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3 changes: 2 additions & 1 deletion Doc/whatsnew/3.10.rst
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Expand Up @@ -1948,7 +1948,8 @@ Changes in the C API
offset instead of a simple offset into the bytecode string. This means that this
number needs to be multiplied by 2 to be used with APIs that expect a byte offset
instead (like :c:func:`PyCode_Addr2Line` for example). Notice as well that the
``f_lasti`` member of ``FrameObject`` objects is not considered stable.
``f_lasti`` member of ``FrameObject`` objects is not considered stable: please
use :c:func:`PyFrame_GetLineNumber` instead.

CPython bytecode changes
========================
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