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 gh-141049.)

• The cval field in PyComplexObject (gh-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.