text: import time
  
  def tic():
      import time
      global startTime_for_tictoc
      startTime_for_tictoc = time.time()
      return startTime_for_tictoc
  
  def toc():
      if 'startTime_for_tictoc' in globals():
          endTime = time.time()
          return endTime - startTime_for_tictoc
      else:
          return None
  