https://github.com/python/cpython/commit/f1f839243251fef7422c31d6a7c3c747e0b5e27c commit: f1f839243251fef7422c31d6a7c3c747e0b5e27c branch: main author: Alex Waygood <[email protected]> committer: AlexWaygood <[email protected]> date: 2024-01-03T19:29:24Z summary:
Document the `co_lines` method on code objects (#113682) Co-authored-by: Hugo van Kemenade <[email protected]> files: M Doc/library/dis.rst M Doc/reference/datamodel.rst M Doc/whatsnew/3.10.rst M Doc/whatsnew/3.13.rst M Misc/NEWS.d/3.12.0a4.rst M Objects/lnotab_notes.txt diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst index 5823142cc75998..7492ae85c4ea46 100644 --- a/Doc/library/dis.rst +++ b/Doc/library/dis.rst @@ -342,17 +342,18 @@ operation is being performed, so the intermediate analysis object isn't useful: .. function:: findlinestarts(code) - This generator function uses the ``co_lines`` method - of the code object *code* to find the offsets which are starts of + This generator function uses the :meth:`~codeobject.co_lines` method + of the :ref:`code object <code-objects>` *code* to find the offsets which + are starts of lines in the source code. They are generated as ``(offset, lineno)`` pairs. .. versionchanged:: 3.6 Line numbers can be decreasing. Before, they were always increasing. .. versionchanged:: 3.10 - The :pep:`626` ``co_lines`` method is used instead of the + The :pep:`626` :meth:`~codeobject.co_lines` method is used instead of the :attr:`~codeobject.co_firstlineno` and :attr:`~codeobject.co_lnotab` - attributes of the code object. + attributes of the :ref:`code object <code-objects>`. .. versionchanged:: 3.13 Line numbers can be ``None`` for bytecode that does not map to source lines. diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst index b3af5c6298d02d..d611bda298b509 100644 --- a/Doc/reference/datamodel.rst +++ b/Doc/reference/datamodel.rst @@ -1219,8 +1219,8 @@ If a code object represents a function, the first item in :attr:`~codeobject.co_consts` is the documentation string of the function, or ``None`` if undefined. -The :meth:`!co_positions` method -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Methods on code objects +~~~~~~~~~~~~~~~~~~~~~~~ .. method:: codeobject.co_positions() @@ -1255,6 +1255,41 @@ The :meth:`!co_positions` method :option:`-X` ``no_debug_ranges`` command line flag or the :envvar:`PYTHONNODEBUGRANGES` environment variable can be used. +.. method:: codeobject.co_lines() + + Returns an iterator that yields information about successive ranges of + :term:`bytecode`\s. Each item yielded is a ``(start, end, lineno)`` + :class:`tuple`: + + * ``start`` (an :class:`int`) represents the offset (inclusive) of the start + of the :term:`bytecode` range + * ``end`` (an :class:`int`) represents the offset (inclusive) of the end of + the :term:`bytecode` range + * ``lineno`` is an :class:`int` representing the line number of the + :term:`bytecode` range, or ``None`` if the bytecodes in the given range + have no line number + + The items yielded generated will have the following properties: + + * The first range yielded will have a ``start`` of 0. + * The ``(start, end)`` ranges will be non-decreasing and consecutive. That + is, for any pair of :class:`tuple`\s, the ``start`` of the second will be + equal to the ``end`` of the first. + * No range will be backwards: ``end >= start`` for all triples. + * The :class:`tuple` yielded will have ``end`` equal to the size of the + :term:`bytecode`. + + Zero-width ranges, where ``start == end``, are allowed. Zero-width ranges + are used for lines that are present in the source code, but have been + eliminated by the :term:`bytecode` compiler. + + .. versionadded:: 3.10 + + .. seealso:: + + :pep:`626` - Precise line numbers for debugging and other tools. + The PEP that introduced the :meth:`!co_lines` method. + .. _frame-objects: diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst index a8a27bfd3dc1bc..cd86c82caffc56 100644 --- a/Doc/whatsnew/3.10.rst +++ b/Doc/whatsnew/3.10.rst @@ -402,9 +402,11 @@ Tracing events, with the correct line number, are generated for all lines of cod The :attr:`~frame.f_lineno` attribute of frame objects will always contain the expected line number. -The :attr:`~codeobject.co_lnotab` attribute of code objects is deprecated and +The :attr:`~codeobject.co_lnotab` attribute of +:ref:`code objects <code-objects>` is deprecated and will be removed in 3.12. -Code that needs to convert from offset to line number should use the new ``co_lines()`` method instead. +Code that needs to convert from offset to line number should use the new +:meth:`~codeobject.co_lines` method instead. PEP 634: Structural Pattern Matching ------------------------------------ diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst index 888ebd0402d0e7..3ab6d1ddc6ef21 100644 --- a/Doc/whatsnew/3.13.rst +++ b/Doc/whatsnew/3.13.rst @@ -816,7 +816,8 @@ although there is currently no date scheduled for their removal. * :mod:`!sre_compile`, :mod:`!sre_constants` and :mod:`!sre_parse` modules. -* :attr:`~codeobject.co_lnotab`: use the ``co_lines`` attribute instead. +* :attr:`codeobject.co_lnotab`: use the :meth:`codeobject.co_lines` method + instead. * :class:`typing.Text` (:gh:`92332`). diff --git a/Misc/NEWS.d/3.12.0a4.rst b/Misc/NEWS.d/3.12.0a4.rst index 75246f3f13503e..ce2814bbe2e5ab 100644 --- a/Misc/NEWS.d/3.12.0a4.rst +++ b/Misc/NEWS.d/3.12.0a4.rst @@ -147,8 +147,8 @@ clinic. .. nonce: yRWQ1y .. section: Core and Builtins -Improve the output of ``co_lines`` by emitting only one entry for each line -range. +Improve the output of :meth:`codeobject.co_lines` by emitting only one entry +for each line range. .. diff --git a/Objects/lnotab_notes.txt b/Objects/lnotab_notes.txt index d45d09d4ab9a50..0f3599340318f0 100644 --- a/Objects/lnotab_notes.txt +++ b/Objects/lnotab_notes.txt @@ -60,7 +60,7 @@ Final form: Iterating over the table. ------------------------- -For the `co_lines` attribute we want to emit the full form, omitting the (350, 360, No line number) and empty entries. +For the `co_lines` method we want to emit the full form, omitting the (350, 360, No line number) and empty entries. The code is as follows: _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-checkins.python.org/ Member address: [email protected]
