[Numpy-discussion] np.nonzero - order guarantees?

Matthew Brett matthew.brett at gmail.com
Mon Jul 27 08:05:01 EDT 2015


`np.nonzero` for a 2D array `A` returns:

row_inds, col_inds = np.nonzero(A)

I notice that `row_inds` appears to be sorted by value, and `col_inds`
appears to be sorted by value, within each row.

Is this a guarantee of the `np.nonzero` function?  If not, does this
function guarantee any property of the returned indices, other than
the correspondence of the row, column entries?



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