bpo-42423: Accept single base class in PyType_FromModuleAndSpec() (GH-23441)

2 files changed, 8 insertions, 4 deletions

diff --git a/Doc/c-api/type.rst b/Doc/c-api/type.rst
index a822b67..a869859 100644
--- a/Doc/c-api/type.rst
+++ b/Doc/c-api/type.rst
@@ -154,9 +154,8 @@ The following functions and structs are used to create
    Creates and returns a heap type object from the *spec*
    (:const:`Py_TPFLAGS_HEAPTYPE`).
 
-   If *bases* is a tuple, the created heap type contains all types contained
-   in it as base types.
-
+   The *bases* argument can be used to specify base classes; it can either
+   be only one class or a tuple of classes.
    If *bases* is ``NULL``, the *Py_tp_bases* slot is used instead.
    If that also is ``NULL``, the *Py_tp_base* slot is used instead.
    If that also is ``NULL``, the new type derives from :class:`object`.
@@ -174,7 +173,8 @@ The following functions and structs are used to create
 
    .. versionchanged:: 3.10
 
-      The function now accepts NULL ``tp_doc`` slot.
+      The function now accepts a single class as the *bases* argument and
+      ``NULL`` as the ``tp_doc`` slot.
 
 .. c:function:: PyObject* PyType_FromSpecWithBases(PyType_Spec *spec, PyObject *bases)
 
diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst
index 16cb7ef..ce66b1d 100644
--- a/Doc/whatsnew/3.10.rst
+++ b/Doc/whatsnew/3.10.rst
@@ -512,6 +512,10 @@ New Features
   reference count of an object and return the object.
   (Contributed by Victor Stinner in :issue:`42262`.)
 
+* The :c:func:`PyType_FromSpecWithBases` and :c:func:`PyType_FromModuleAndSpec`
+  functions now accept a single class as the *bases* argument.
+  (Contributed by Serhiy Storchaka in :issue:`42423`.)
+
 * The :c:func:`PyType_FromModuleAndSpec` function now accepts NULL ``tp_doc``
   slot.
   (Contributed by Hai Shi in :issue:`41832`.)