parameters: (self, step, session)
docstring: Callback after a step is finished or `end()` is called.
  
      Args:
        step: `int`, the current value of the global step.
        session: `Session` object.
docstring_summary: Callback after a step is finished or `end()` is called.
docstring_tokens: Callback after a step is finished or end () is called .
function: def every_n_post_step(self, step, session):
      """Callback after a step is finished or `end()` is called.
  
      Args:
        step: `int`, the current value of the global step.
        session: `Session` object.
      """
      pass
function_tokens: def every_n_post_step ( self , step , session ) : pass