Prefer sys.base_* paths in Py_Get(Exec)Prefix deprecation notes

Signed-off-by: y5c4l3 <y5c4l3@proton.me>

Doc/c-api/init.rst

@@ -625,7 +625,7 @@ Process-wide parameters
  returned string points into static storage; the caller should not modify its
  value. This corresponds to the :makevar:`prefix` variable in the top-level
  :file:`Makefile` and the :option:`--prefix` argument to the :program:`configure`
- script at build time. The value is available to Python code as ``sys.prefix``.
+ script at build time. The value is available to Python code as ``sys.base_prefix``.
  It is only useful on Unix. See also the next function.
 
  This function should not be called before :c:func:`Py_Initialize`, otherwise
@@ -635,7 +635,8 @@ Process-wide parameters
  It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
  .. deprecated-removed:: 3.13 3.15
- Get :data:`sys.prefix` instead.
+ Get :data:`sys.base_prefix` instead, or :data:`sys.prefix` if
+ :ref:`virtual environments <venv-def>` need to be handled.
 
 
 .. c:function:: wchar_t* Py_GetExecPrefix()
@@ -648,7 +649,8 @@ Process-wide parameters
  should not modify its value. This corresponds to the :makevar:`exec_prefix`
  variable in the top-level :file:`Makefile` and the ``--exec-prefix``
  argument to the :program:`configure` script at build time. The value is
- available to Python code as ``sys.exec_prefix``. It is only useful on Unix.
+ available to Python code as ``sys.base_exec_prefix``. It is only useful on
+ Unix.
 
  Background: The exec-prefix differs from the prefix when platform dependent
  files (such as executables and shared libraries) are installed in a different
@@ -679,7 +681,8 @@ Process-wide parameters
  It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
  .. deprecated-removed:: 3.13 3.15
- Get :data:`sys.exec_prefix` instead.
+ Get :data:`sys.base_exec_prefix` instead, or :data:`sys.exec_prefix` if
+ :ref:`virtual environments <venv-def>` need to be handled.
 
 
 .. c:function:: wchar_t* Py_GetProgramFullPath()

Doc/deprecations/c-api-pending-removal-in-3.15.rst

@@ -13,11 +13,11 @@ Pending Removal in Python 3.15
  * :c:func:`PySys_ResetWarnOptions`:
  Clear :data:`sys.warnoptions` and :data:`!warnings.filters` instead.
  * :c:func:`Py_GetExecPrefix`:
- Get :data:`sys.exec_prefix` instead.
+ Get :data:`sys.base_exec_prefix` and :data:`sys.exec_prefix` instead.
  * :c:func:`Py_GetPath`:
  Get :data:`sys.path` instead.
  * :c:func:`Py_GetPrefix`:
- Get :data:`sys.prefix` instead.
+ Get :data:`sys.base_prefix` and :data:`sys.prefix` instead.
  * :c:func:`Py_GetProgramFullPath`:
  Get :data:`sys.executable` instead.
  * :c:func:`Py_GetProgramName`: