[Numpy-discussion] dtype comparison, hash

Andreas Kloeckner lists at informa.tiker.net
Mon Dec 26 20:22:05 EST 2011


Hi all,

Two questions:

- Are dtypes supposed to be comparable (i.e. implement '==', '!=')? 
- Are dtypes supposed to be hashable?

PyCUDA and PyOpenCL assume both in a few places, but at least
hashability doesn't seem to be true. (If so, __hash__ should be
implemented to throw an error. If not, we found a bug in the hash
implementation.)

Thanks!
Andreas


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