class_docstr: A class to track the time for a process.
  
  Attributes
  ----------
  start : int
      The time of start for the clock.
  step : int
      The time of the process the clock is at currently.
  
  Methods
  -------
  now(format=None)
      Gets the current time in the provided format.
  increment()
      Increments the clock by specified time increment.
  reset()
      Resets the clock.
code: def __init__(self):
      self.start = 0
      self.step = self.start
  
imports: from datetime import datetime
label_desc: Use image node_id 1 to create a new Clock object from inherited base classes: object with example: obj = Clock()