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bpo-39153: Clarify C API *SetItem refcounting semantics (GH-18220)

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Some of the *SetItem methods in the C API steal a reference to the
given value. This annotates the better behaved ones to assure the
reader that these are not the ones with the inconsistent behaviour.

* 📜🤖 Added by blurb_it.

* make docs consistent with signature

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
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Joannah Nanjekye 2020-01-29 07:20:53 -04:00 • committed by GitHub
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Doc/c-api/mapping.rst
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@ -37,7 +37,8 @@ See also :c:func:`PyObject_GetItem`, :c:func:`PyObject_SetItem` and
Map the string *key* to the value *v* in object *o*. Returns ``-1`` on
failure. This is the equivalent of the Python statement ``o[key] = v``.
See also :c:func:`PyObject_SetItem`.
See also :c:func:`PyObject_SetItem`. This function *does not* steal a
reference to *v*.
.. c:function:: int PyMapping_DelItem(PyObject *o, PyObject *key)