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> If I only convert PyFrame_New() then I would need to add it to as existing page since the patch created a new page for Frame Objects. I think the right place would be under the current PyFrameObject in Doc/c-api/veryhigh.rst?
Not, it's a very high level API, it's a low level API which should be referenced in the concrete.rst page, as I didn in my patch.
I think it's ok to have a page with only two functions: PyFrame_New() and PyFrame_GetLineNumber().
Move https://docs.python.org/dev/c-api/reflection.html#c.PyFrame_GetLineNumber into your new doc, but leave something like "See also :c:func:`PyFrame_GetLineNumber`." there.