numpy.ix_(*args)

numpy.triu_indices_from(arr, k=0)

numpy.diag(v, k=0)

numpy.mask_indices(n, mask_func, k=0)

class numpy.nditer

numpy.ravel_multi_index(multi_index, dims, mode='raise', order='C') Converts a tuple of index arrays into an array

class numpy.flatiter

numpy.select(condlist, choicelist, default=0)

numpy.place(arr, mask, vals)

numpy.compress(condition, a, axis=None, out=None)