How to use several summary collections in Tensorflow?

Question

I have 2 distinctive groups of summaries. One is collected once per batch another one is collected once per epoch. How can I use merge_all_summaries(key=\'???\')

Answer 1

Problem solved. collections parameter of a summary is supposed to be a list. Solution:

  # once per batch 
  tf.scalar_summary("loss", graph.loss)
  tf.scalar_summary("batch_acc", batch_accuracy)
  # once per epoch
  tf.histogram_summary("embedding/W", W, collections=['per_epoch'])
  tf.histogram_summary("embedding/D", D, collections=['per_epoch'])

  tf.merge_all_summaries()                # -> (MergeSummary...) :)
  tf.merge_all_summaries(key='per_epoch') # -> (MergeSummary...) :)

Edit. Syntactical change in TF:

# once per batch 
  tf.summary.scalar("loss", graph.loss)
  tf.summary.scalar("batch_acc", batch_accuracy)
  # once per epoch
  tf.summary.histogram("embedding/W", W, collections=['per_epoch'])
  tf.summary.histogram("embedding/D", D, collections=['per_epoch'])

  tf.summary.merge_all()                # -> (MergeSummary...) :)
  tf.summary.merge_all(key='per_epoch') # -> (MergeSummary...) :)