code: def updateTimer(self):
      self.timer.setInterval(
          1000 / (self.mNumberOfLines * self.mRevolutionsPerSecond)
      )
  
imports: from math import ceil
  from PyQt5.QtCore import *
  from PyQt5.QtGui import *
  from PyQt5.QtWidgets import *
label_desc: Use image node_id 5 for calling the Spinner obj's underlying member method code with example usage: obj.updateTimer() without return types