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Merges all summaries collected in the default graph. (deprecated)


This op is deprecated. Please switch to tf.compat.v1.summary.merge_all, which has identical behavior.


  • key: GraphKey used to collect the summaries. Defaults to GraphKeys.SUMMARIES.


If no summaries were collected, returns None. Otherwise returns a scalar Tensor of type string containing the serialized Summary protocol buffer resulting from the merging.