code: def __init__(self, number):
      self.number = number
  
      self.loss = None
      self.batch_metrics = None
      self.size = None
  
file_path: poutyne/poutyne/framework/iterators.py
imports: import itertools
  import timeit
label_desc: Use image node_id 1 to create a new Step object  with example: obj = Step(number)