Two interesting TODO.

sysmodule.c: get_xoptions()

        /* PEP432 TODO: we can reach this if xoptions is NULL in the main
        *  interpreter config. When that happens, we need to properly set
         * the `xoptions` reference in the main interpreter config as well.
         *
         * For Python 3.7, we shouldn't be able to get here due to the
         * combination of how _PyMainInterpreter_ReadConfig and _PySys_EndInit
         * work, but we expect 3.8+ to make the _PyMainInterpreter_ReadConfig
         * call optional for embedding applications, thus making this
         * reachable again.
         */

sysmodule.c: get_warnoptions()

        /* PEP432 TODO: we can reach this if warnoptions is NULL in the main
        *  interpreter config. When that happens, we need to properly set
         * the `warnoptions` reference in the main interpreter config as well.
         *
         * For Python 3.7, we shouldn't be able to get here due to the
         * combination of how _PyMainInterpreter_ReadConfig and _PySys_EndInit
         * work, but we expect 3.8+ to make the _PyMainInterpreter_ReadConfig
         * call optional for embedding applications, thus making this
         * reachable again.
         */