This op is used as a placeholder in If branch functions. It doesn't provide a

    dtype, shape, name=None

valid output when run, so must either be removed (e.g. replaced with a function input) or guaranteed not to be used (e.g. if mirroring an intermediate output needed for the gradient computation of the other branch).


  • dtype: A tf.DType. The type of the output.
  • shape: A tf.TensorShape or list of ints. The purported shape of the output. This is only used for shape inference; the output will not necessarily have this shape. Can be a partial shape.
  • name: A name for the operation (optional).


A Tensor of type dtype.