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Outputs a Summary protocol buffer containing a single scalar value.

    name, tensor, collections=None, family=None

The generated Summary has a Tensor.proto containing the input Tensor.


  • name: A name for the generated node. Will also serve as the series name in TensorBoard.
  • tensor: A real numeric Tensor containing a single value.
  • collections: Optional list of graph collections keys. The new summary op is added to these collections. Defaults to [GraphKeys.SUMMARIES].
  • family: Optional; if provided, used as the prefix of the summary tag name, which controls the tab name used for display on Tensorboard.


A scalar Tensor of type string. Which contains a Summary protobuf.


  • ValueError: If tensor has the wrong shape or type.