From: Georg Brandl <georg@python.org>
Date: Mon, 6 Oct 2014 12:15:06 +0000 (+0200)
Subject: Closes #22507: document that PyType_IsSubtype does not call __subclasscheck__.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b74cf54a647d8038c7fd40effe6049570a03818b;p=python

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

diff --git a/Doc/c-api/type.rst b/Doc/c-api/type.rst
index 22f7dd0ff6..957cccf82c 100644
--- 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)