tf.contrib.learn.monitors.BaseMonitor.step_begin()

tf.contrib.learn.monitors.BaseMonitor.step_begin(step)

Callback before training step begins.

You may use this callback to request evaluation of additional tensors in the graph.

Args:

• step: int, the current value of the global step.

Returns:

List of Tensor objects or string tensor names to be run.

Raises:

• ValueError: if we've already begun a step, or step < 0, or step > max_steps.