mirror of
https://github.com/python/cpython.git
synced 2024-11-24 08:52:25 +01:00
fd6cd621e0
PEP 667's description of the planned changes to PyEval_GetLocals was internally inconsistent when accepted, so the docs added for gh-74929 didn't match either the current behaviour or the intended behaviour once gh-118934 is fixed. This PR updates the documentation and 3.13 What's New to match the intended behaviour (once gh-118934 is fixed). It also tidies up lingering references to `f_locals` always being a dictionary (this hasn't been true since at least when custom namespace support for class statement execution was added)
107 lines
3.7 KiB
ReStructuredText
107 lines
3.7 KiB
ReStructuredText
.. highlight:: c
|
|
|
|
.. _reflection:
|
|
|
|
Reflection
|
|
==========
|
|
|
|
.. c:function:: PyObject* PyEval_GetBuiltins(void)
|
|
|
|
.. deprecated:: 3.13
|
|
|
|
Use :c:func:`PyEval_GetFrameBuiltins` instead.
|
|
|
|
Return a dictionary of the builtins in the current execution frame,
|
|
or the interpreter of the thread state if no frame is currently executing.
|
|
|
|
|
|
.. c:function:: PyObject* PyEval_GetLocals(void)
|
|
|
|
.. deprecated:: 3.13
|
|
|
|
Use either :c:func:`PyEval_GetFrameLocals` to obtain the same behaviour as calling
|
|
:func:`locals` in Python code, or else call :c:func:`PyFrame_GetLocals` on the result
|
|
of :c:func:`PyEval_GetFrame` to access the :attr:`~frame.f_locals` attribute of the
|
|
currently executing frame.
|
|
|
|
Return a mapping providing access to the local variables in the current execution frame,
|
|
or ``NULL`` if no frame is currently executing.
|
|
|
|
Refer to :func:`locals` for details of the mapping returned at different scopes.
|
|
|
|
As this function returns a :term:`borrowed reference`, the dictionary returned for
|
|
:term:`optimized scopes <optimized scope>` is cached on the frame object and will remain
|
|
alive as long as the frame object does. Unlike :c:func:`PyEval_GetFrameLocals` and
|
|
:func:`locals`, subsequent calls to this function in the same frame will update the
|
|
contents of the cached dictionary to reflect changes in the state of the local variables
|
|
rather than returning a new snapshot.
|
|
|
|
.. versionchanged:: 3.13
|
|
As part of :pep:`667`, :c:func:`PyFrame_GetLocals`, :func:`locals`, and
|
|
:attr:`FrameType.f_locals <frame.f_locals>` no longer make use of the shared cache
|
|
dictionary. Refer to the :ref:`What's New entry <whatsnew313-locals-semantics>` for
|
|
additional details.
|
|
|
|
|
|
.. c:function:: PyObject* PyEval_GetGlobals(void)
|
|
|
|
.. deprecated:: 3.13
|
|
|
|
Use :c:func:`PyEval_GetFrameGlobals` instead.
|
|
|
|
Return a dictionary of the global variables in the current execution frame,
|
|
or ``NULL`` if no frame is currently executing.
|
|
|
|
|
|
.. c:function:: PyFrameObject* PyEval_GetFrame(void)
|
|
|
|
Return the current thread state's frame, which is ``NULL`` if no frame is
|
|
currently executing.
|
|
|
|
See also :c:func:`PyThreadState_GetFrame`.
|
|
|
|
|
|
.. c:function:: PyObject* PyEval_GetFrameBuiltins(void)
|
|
|
|
Return a dictionary of the builtins in the current execution frame,
|
|
or the interpreter of the thread state if no frame is currently executing.
|
|
|
|
.. versionadded:: 3.13
|
|
|
|
|
|
.. c:function:: PyObject* PyEval_GetFrameLocals(void)
|
|
|
|
Return a dictionary of the local variables in the current execution frame,
|
|
or ``NULL`` if no frame is currently executing. Equivalent to calling
|
|
:func:`locals` in Python code.
|
|
|
|
To access :attr:`~frame.f_locals` on the current frame without making an independent
|
|
snapshot in :term:`optimized scopes <optimized scope>`, call :c:func:`PyFrame_GetLocals`
|
|
on the result of :c:func:`PyEval_GetFrame`.
|
|
|
|
.. versionadded:: 3.13
|
|
|
|
|
|
.. c:function:: PyObject* PyEval_GetFrameGlobals(void)
|
|
|
|
Return a dictionary of the global variables in the current execution frame,
|
|
or ``NULL`` if no frame is currently executing. Equivalent to calling
|
|
:func:`globals` in Python code.
|
|
|
|
.. versionadded:: 3.13
|
|
|
|
|
|
.. c:function:: const char* PyEval_GetFuncName(PyObject *func)
|
|
|
|
Return the name of *func* if it is a function, class or instance object, else the
|
|
name of *func*\s type.
|
|
|
|
|
|
.. c:function:: const char* PyEval_GetFuncDesc(PyObject *func)
|
|
|
|
Return a description string, depending on the type of *func*.
|
|
Return values include "()" for functions and methods, " constructor",
|
|
" instance", and " object". Concatenated with the result of
|
|
:c:func:`PyEval_GetFuncName`, the result will be a description of
|
|
*func*.
|