sbodenstein commented on issue #11984: WIP - Generalized broadcast_like operator URL: https://github.com/apache/incubator-mxnet/pull/11984#issuecomment-409952182 I find this design counterintuitive: ``` s=mx.sym.broadcast_like(mx.sym.Variable("lhs"), mx.sym.Variable("rhs"), other_axes=(),input_axes=()) s.infer_shape(lhs=(1,7,1,1), rhs=(3,7,9,4))[1] [(3, 7, 9, 4)] ``` So `input_axes=()` is equivalent to `input_axes=(0, 2, 3)`. Surely an empty tuple should be interpreted as the identity? You could make `other_axes` and `input_axes` optional with default `None`.
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