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-rw-r--r--Doc/c-api/object.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/Doc/c-api/object.rst b/Doc/c-api/object.rst
index 8410934..afa08c9 100644
--- a/Doc/c-api/object.rst
+++ b/Doc/c-api/object.rst
@@ -108,6 +108,9 @@ Object Protocol
Python expression ``o1 op o2``, where ``op`` is the operator corresponding to
*opid*.
+.. note::
+ If *o1* and *o2* are the same object, :c:func:`PyObject_RichCompareBool`
+ will always return ``1`` for :const:`Py_EQ` and ``0`` for :const:`Py_NE`.
.. c:function:: PyObject* PyObject_Repr(PyObject *o)