code: def epoch_end(self, network):
      epoch = network.last_epoch
      self.last_epoch_time = time.time() - self.epoch_start_time
  
      if epoch % network.show_epoch == 0 or epoch == self.first_epoch:
          self.print_last_error(network)
          self.last_epoch_shown = network.last_epoch
  
imports: from __future__ import unicode_literals
  import time
  import progressbar
  from neupy.utils import iters
label_desc: Use image node_id 6 for calling the PrintLastErrorSignal obj's underlying member method code with example usage: obj.epoch_end(network) without return types