bpo-46836: Add Doc/c-api/frame.rst by vstinner · Pull Request #32051 · python/cpython

Given that this is the C API docs, any reference to Python attributes is likely to be misread as referring to C struct fields, so it is best not to list the Python attributes here.

Could you list the C API functions, PyFrame_GetLineNumber, etc, first?
I'll add docs to the new accessors here, as I add them.

Then add a comment that Python-level attributes can be accessed by PyObject_GetAttr[String] and PyObject_SetAttr[String] with an example:

E.g. PyObject_GetAttrString(frame, "f_lineno") is equivalent to PyFrame_GetLineNumber(frame)