Pending removal in Python 3.20

• !_PyObject_CallMethodId, !_PyObject_GetAttrId and !_PyUnicode_FromId are deprecated since 3.15 and will be removed in 3.20. Instead, use PyUnicode_InternFromString() and cache the result in the module state, then call PyObject_CallMethod or PyObject_GetAttr. (Contributed by Victor Stinner in 141049.)
• The cval field in PyComplexObject (128813). Use PyComplex_AsCComplex and PyComplex_FromCComplex to convert a Python complex number to/from the C Py_complex representation.
• Macros !Py_MATH_PIl and !Py_MATH_El.