Alexander Belopolsky email@example.com added the comment:
On Mon, Jul 19, 2010 at 2:17 PM, Antoine Pitrou firstname.lastname@example.org wrote:
.. These flags are primarily useful for C extension developers, there's little point checking them from Python code.
Of course there is: it helps debugging problems in types implemented in C. For example, someone working on the numpy issue described in msg110788, would probably appreciate having inspect.TPFLAGS_INT_SUBCLASS and would probaly use it in his or hers unit tests.
My point is: we have __flags__ attribute on type objects exposed in python there should be a way to interpret what it means without looking up object.h or C API documentation.
BTW, __flags__ itself could grow a docstring and deserves to be mentioned in the docs. Note that copyreg.py uses it to determine wither a class is dynamically allocated. Maybe this should also go to inspect as inspect.isheaptype().