code: def showPerformance(self):
          
          if len(self.inputs) == 0:
              print('no patterns to test')
              return
          self.setContext()
          while True:
              BackpropNetwork.showPerformance(self)
              if self.quitFromSweep:
                  return
docs: SRN.showPerformance()
          Clears the context layer(s) and then repeatedly cycles through
          training patterns until the user decides to quit.