class_docstr: Interface for performing each step of a training algorithm.
code: def __init__(self, distribution):
      self._distribution = distribution
  
file_path: tensorflow-upstream/tensorflow/python/distribute/step_fn.py
imports: from tensorflow.python.eager import backprop
  from tensorflow.python.training import optimizer
label_desc: Use image node_id 1 to create a new Step object from inherited base classes: object with example: obj = Step(distribution)