Hi All, I would like to propose that the bit_ops preserve the length of the relevant types. Currently we have:
In [1]: ones(1,dtype=int8) & ones(1,dtype=uint8) Out[1]: array([1], dtype=int16) In [3]: ones(1,dtype=int64) & ones(1,dtype=uint64) Out[3]: array([1], dtype=object) Note the increased size in the first case and the return of a Python long integer object in the second. As all the high order bits will be zeroed in any case when the smaller elements are sign extended, I propose that in these mixed cases an unsigned type be returned of the same size as the largest input size. I think this conforms with the rule of least surprise. Chuck
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