[Numpy-discussion] detecting shared data

Matthew Koichi Grimes mkg@cs.nyu....
Wed Apr 11 17:37:05 CDT 2007

It's better than nothing. I basically want some sanity-check assert code 
that can assert that some arrays are in fact sub-arrays of another 
array. Your OWNDATA suggestion meets me halfway by allowing me to check 
that these sub-arrays are at least sub-arrays of *someone*.

-- Matt

Pierre GM wrote:
> On Wednesday 11 April 2007 18:12:16 Matthew Koichi Grimes wrote:
>> Is there any way to detect whether one array is a view into another
>> array? I'd like something like:
>>  >>> arr = N.arange(5)
>>  >>> subarr = arr[1:3]
>>  >>> sharesdata(arr, subarr)
> Mmh, would arr.flags['OWNDATA'] would do the trick ?
> p.

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