code: def setattr(self, name, value):
          
          for i in self.values():
              setattr(i, name, value)
docs: Set an attribute to a new value for all Parameters.
  
          For example, set grad_req to null if you don't need gradient w.r.t a
          model's Parameters::
  
              model.collect_params().setattr('grad_req', 'null')
  
          or change the learning rate multiplier::
  
              model.collect_params().setattr('lr_mult', 0.5)
  
          Parameters
          ----------
          name : str
              Name of the attribute.
          value : valid type for attribute name
              The new value for the attribute.