Closes #22507: document that PyType_IsSubtype does not call __subclasscheck__.

Closes #22507: document that PyType_IsSubtype does not call subclasscheck.
b74cf54a · Georg Brandl · 4a89fd9b · b74cf54a
Commit b74cf54a authored Oct 06, 2014 by Georg Brandl
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Doc/c-api/type.rst Doc/c-api/type.rst +5 -0

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--- a/Doc/c-api/type.rst
+++ b/Doc/c-api/type.rst
@@ -71,6 +71,11 @@ Type Objects

   .. versionadded:: 2.2

+   This function only checks for actual subtypes, which means that
+   :meth:`~type.__subclasscheck__` is not called on *b*.  Call
+   :c:func:`PyObject_IsSubclass` to do the same check that :func:`issubclass`
+   would do.
+

 .. c:function:: PyObject* PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems)