class_docstr: Class to bind an optimizer, model, strategy, and training step function.
class_docstr_tok: ["Class","to","bind","an","optimizer",",","model",",","strategy",",","and","training","step","function","."]
docstr: The number of training steps completed.
docstr_tok: ["The","number","of","training","steps","completed","."]
code: def step(self):
      """The number of training steps completed."""
      return self.optimizer.iterations
  
file_path: ddsp/ddsp/training/trainers.py
imports: import time
  from absl import logging
  from ddsp.training import train_util
  import gin
  import tensorflow.compat.v2
label_desc: Use image node_id 5 for calling the Trainer obj's underlying member method code with example usage: obj.step() and returns: self