haojin2 commented on a change in pull request #17904: [Numpy] add: numpy op
trilindices
URL: https://github.com/apache/incubator-mxnet/pull/17904#discussion_r400589755
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File path: python/mxnet/numpy/multiarray.py
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@@ -5533,6 +5533,87 @@ def tril(m, k=0):
"""
return _mx_nd_np.tril(m, k)
+@set_module('mxnet.numpy')
+def tril_indices(n, k=0, m=None):
+ """
+ Return the indices for the lower-triangle of an (n, m) array.
+
+ Parameters
+ ----------
+ n : int
+ The row dimension of the arrays for which the returned
+ indices will be valid.
+ k : int, optional
+ Diagonal offset (see `tril` for details).
+ m : int, optional
+ .. versionadded:: 1.9.0
+
+ The column dimension of the arrays for which the returned
+ arrays will be valid.
+ By default `m` is taken equal to `n`.
+
+
+ Returns
+ -------
+ inds : tuple of arrays
+ The indices for the triangle. The returned tuple contains two arrays,
+ each with the indices along one dimension of the array.
+
+ See also
+ --------
+ triu_indices : similar function, for upper-triangular.
+ mask_indices : generic function accepting an arbitrary mask function.
+ tril, triu
+
+ Notes
+ -----
+ .. versionadded:: 1.4.0
Review comment:
no need for `Notes` section
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