Describe the new PyObject_Pretty() function

Author: warsaw

peps/pep-0813.rst

@@ -108,6 +108,15 @@ will be added.  The effect of this specifier with an expression ``value`` will b
 :py:func:`python:pprint.pformat`, passing ``value`` as the only argument. In this initial specification, it
 will be an error to provide any format specifier if ``!p`` is used.
 
+Additions to the C-API
+----------------------
+
+To support ``!p``, a new function, ``PyObject_Pretty()`` is added to the
+`Limited C API <https://docs.python.org/3/c-api/stable.html#limited-c-api>`_.
+This function takes a single ``PyObject *``, the object to pretty print.  This
+function imports the ``pprint`` module and calls :func:`pprint.pformat` with
+this object as its argument, returning the results.
+
 .. _examples:
 
 Examples
@@ -305,6 +314,7 @@ Change History
   * Specify that the ``!p`` conversion in f-strings and ``str.format()`` implicitly perform an
     import of the ``pprint`` module.
   * Clarify the language around the new optional keyword-only argument ``pretty`` to ``print()``.
+  * Describe the new Limited C API function ``PyObject_Pretty()``.
 
 
 Copyright