Configurable Verbosity

[melvinma]

I was trying to debug a seq2seq model and found two issues (debug options are not described, and verbosity can not be configured). In this issue, I am focusing on configurable verbosity.

It appears to be extremely simple - in bin/train.py, I was the following line. We could simply add an option to make it configurable from command line. Why do not we do that? Thanks!

if __name__ == "__main__":
  tf.logging.set_verbosity(tf.logging.INFO)
  tf.app.run()