bpo-42260: Fix _PyConfig_Read() if compute_path_config=0 (GH-23220)
Fix _PyConfig_Read() if compute_path_config=0: use values set by
Py_SetPath(), Py_SetPythonHome() and Py_SetProgramName(). Add
compute_path_config parameter to _PyConfig_InitPathConfig().
The following functions now return NULL if called before
Py_Initialize():
* Py_GetExecPrefix()
* Py_GetPath()
* Py_GetPrefix()
* Py_GetProgramFullPath()
* Py_GetProgramName()
* Py_GetPythonHome()
These functions no longer automatically computes the Python Path
Configuration. Moreover, Py_SetPath() no longer computes
program_full_path.
diff --git a/Doc/c-api/init.rst b/Doc/c-api/init.rst
index 3d18bb3..5736b83 100644
--- a/Doc/c-api/init.rst
+++ b/Doc/c-api/init.rst
@@ -376,6 +376,12 @@
The returned string points into static storage; the caller should not modify its
value.
+ This function should not be called before :c:func:`Py_Initialize`, otherwise
+ it returns ``NULL``.
+
+ .. versionchanged:: 3.10
+ It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
+
.. c:function:: wchar_t* Py_GetPrefix()
@@ -389,6 +395,12 @@
script at build time. The value is available to Python code as ``sys.prefix``.
It is only useful on Unix. See also the next function.
+ This function should not be called before :c:func:`Py_Initialize`, otherwise
+ it returns ``NULL``.
+
+ .. versionchanged:: 3.10
+ It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
+
.. c:function:: wchar_t* Py_GetExecPrefix()
@@ -424,6 +436,12 @@
while having :file:`/usr/local/plat` be a different filesystem for each
platform.
+ This function should not be called before :c:func:`Py_Initialize`, otherwise
+ it returns ``NULL``.
+
+ .. versionchanged:: 3.10
+ It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
+
.. c:function:: wchar_t* Py_GetProgramFullPath()
@@ -437,6 +455,12 @@
static storage; the caller should not modify its value. The value is available
to Python code as ``sys.executable``.
+ This function should not be called before :c:func:`Py_Initialize`, otherwise
+ it returns ``NULL``.
+
+ .. versionchanged:: 3.10
+ It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
+
.. c:function:: wchar_t* Py_GetPath()
@@ -455,8 +479,14 @@
can be (and usually is) modified later to change the search path for loading
modules.
+ This function should not be called before :c:func:`Py_Initialize`, otherwise
+ it returns ``NULL``.
+
.. XXX should give the exact rules
+ .. versionchanged:: 3.10
+ It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
+
.. c:function:: void Py_SetPath(const wchar_t *)
@@ -638,6 +668,12 @@
:c:func:`Py_SetPythonHome`, or the value of the :envvar:`PYTHONHOME`
environment variable if it is set.
+ This function should not be called before :c:func:`Py_Initialize`, otherwise
+ it returns ``NULL``.
+
+ .. versionchanged:: 3.10
+ It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
+
.. _threads: