code: def set_rate(rate):
      
      if not (isinstance(rate, int) or isinstance(rate, float)):
          raise TypeError("argument to set_rate is expected to be int or float")
      global loop_duration
      loop_duration = 1.0/rate
docs: Defines the ideal rate at which computation is to be performed
  
      :arg rate: the frequency in Hertz 
      :type rate: int or float
  
      :raises: TypeError: if argument 'rate' is not int or float