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The following functions accept a diagonal offset argument: - https://numpy.org/doc/stable/reference/generated/numpy.diag.html - https://numpy.org/doc/stable/reference/generated/numpy.diagflat.html - https://numpy.org/doc/stable/reference/generated/numpy.diagonal.html - https://numpy.org/doc/stable/reference/generated/numpy.eye.html - https://numpy.org/doc/stable/reference/generated/numpy.trace.html - https://numpy.org/doc/stable/reference/generated/numpy.tri.html - https://numpy.org/doc/stable/reference/generated/numpy.tril.html - https://numpy.org/doc/stable/reference/generated/numpy.tril_indices.html - https://numpy.org/doc/stable/reference/generated/numpy.tril_indices_from.htm... - https://numpy.org/doc/stable/reference/generated/numpy.triu.html - https://numpy.org/doc/stable/reference/generated/numpy.triu_indices.html - https://numpy.org/doc/stable/reference/generated/numpy.triu_indices_from.htm... The following functions lack such an argument: - https://numpy.org/doc/stable/reference/generated/numpy.diag_indices.html - https://numpy.org/doc/stable/reference/generated/numpy.diag_indices_from.htm... - https://numpy.org/doc/stable/reference/generated/numpy.fill_diagonal.html - https://github.com/numpy/numpy/issues/14402 - https://github.com/numpy/numpy/issues/18000 - https://github.com/numpy/numpy/pull/15079 - https://numpy.org/doc/stable/reference/generated/numpy.identity.html Feature request: Add a diagonal offset argument to all of the functions that are missing it. (fill_diagonal is already tracked by the aforementioned issues, but the rest aren't, to my knowledge.)