[Numpy-discussion] numpy.ascontiguousarray on byteswapped data !?
haase at msg.ucsf.edu
Thu Aug 10 23:32:28 CDT 2006
Travis Oliphant wrote:
> Sebastian Haase wrote:
>> Does numpy.ascontiguousarray(arr) "fix" the byteorder when arr is
>> non-native byteorder ?
>> If not, what functions does ?
> It can if you pass in a data-type with the right byteorder (or use a
> native built-in data-type).
> In NumPy, it's the data-type that carries the "byte-order"
> information. So, there are lot's of ways to "fix" the byte-order.
So then the question is: what is the easiest way to say:
give me the equivalent type of dtype, but with byteorder '<' (or '=') !?
I would be cumbersome (and ugly ;-) ) if one would have to "manually
assemble" such a construct every time ...
> Of course there is still the difference between "fixing" the byte-order
> and simply "viewing" the memory in the correct byte-order. The former
> physically flips bytes around, the latter just flips them on calculation
> and presentation.
I understand. I need something that I can feed into my C routines that
are to dumb to handle non-contiguous or byte-swapped data .
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