[Numpy-discussion] Question about repeated values in X in A[X] = Y
Thouis (Ray) Jones
Thu Mar 24 16:40:45 CDT 2011
I have done some work on scipy.ndimage.measurements, and was adding to
it recently when I noticed I had made use of the idiom
A[X] = Y
with repeated indices in X, relying on the behavior that the last X,Y
pair at each unique X is the one that is assigned in A (last = last by
position in X).
I thought I had found documentation of this behavior, somewhere, but
when another developer asked, I was unable to locate it (perhaps I
just forgot the google keywords I used last time).
So, before I rely too much on this behavior, I thought I should make
sure it was:
- reasonable future-proof,
- and documented (if the first two are true).
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