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# numpy.tril_indices_from

`numpy.``tril_indices_from`(arr, k=0)

  Return the indices for the lower-triangle of arr.

  See `tril_indices` for full details.

  Parameters : | arr : array_like The indices will be valid for square arrays whose dimensions are the same as arr. k : int, optional Diagonal offset (see `tril` for details).

  See also

  `tril_indices`, `tril`

  Notes

  New in version 1.4.0.