Message 299542 - Python tracker

Since previous comment, I've studied the switch for show/hide implementation detail.  As the result, I have understood the Py_BUILD_CORE macro hasn't been generally used for hiding implementation detail (and Py_LIMITED_API does the part).
Therefore, I withdraw previous proposal for implementation detail, and I'm going to fix PEP a few.  After that, I'd like to post to python-dev to know the developer's view of the PEP draft.