attribute
Bit-flags describing how this data type is to be interpreted.
Bit-masks are in numpy._core.multiarray as the constants ITEM_HASOBJECT, LIST_PICKLE, ITEM_IS_POINTER, NEEDS_INIT, NEEDS_PYAPI, USE_GETITEM, USE_SETITEM. A full explanation of these flags is in C-API documentation; they are largely useful for user-defined data-types.
The following example demonstrates that operations on this particular dtype requires Python C-API.
Examples
>>> import numpy as np
>>> x = np.dtype([('a', np.int32, 8), ('b', np.float64, 6)])
>>> x.flags
16
>>> np._core.multiarray.NEEDS_PYAPI
16
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