Create train and eval hooks for Experiment.

def create_hooks(use_tfdbg=False,
                 use_dbgprofile=False,
                 dbgprofile_kwargs=None,
                 use_validation_monitor=False,
                 validation_monitor_kwargs=None,
                 use_early_stopping=False,
                 early_stopping_kwargs=None):
  """Create train and eval hooks for Experiment."""
  train_hooks = []
  eval_hooks = []

  if use_tfdbg:
    hook = debug.LocalCLIDebugHook()
    train_hooks.append(hook)
    eval_hooks.append(hook)

  if use_dbgprofile:
    # Recorded traces can be visualized with chrome://tracing/
    # The memory/tensor lifetime is also profiled
    tf.logging.info("Using ProfilerHook")
    defaults = dict(save_steps=10, show_dataflow=True, show_memory=True)
    defaults.update(dbgprofile_kwargs)
    train_hooks.append(tf.train.ProfilerHook(**defaults))

  if use_validation_monitor:
    tf.logging.info("Using ValidationMonitor")
    train_hooks.append(
        tf.contrib.learn.monitors.ValidationMonitor(
            hooks=eval_hooks, **validation_monitor_kwargs))

  if use_early_stopping:
    tf.logging.info("Using EarlyStoppingHook")
    hook = metrics_hook.EarlyStoppingHook(**early_stopping_kwargs)
    # Adding to both training and eval so that eval aborts as well
    train_hooks.append(hook)
    eval_hooks.append(hook)

  return train_hooks, eval_hooks