code: def on_epoch_begin(self, training_state):
      training_state.step_time = time.time()
      training_state.step_time_total = 0.0
  
imports: from __future__ import division, print_function, absolute_import
  import time
  import sys
label_desc: Use image node_id 3 for calling the TermLogger obj's underlying member method code with example usage: obj.on_epoch_begin(training_state) without return types