code: def set_parameters_upstream(self, parameters):
          
          assert isinstance(parameters, dict), 'parameters must be dict, got {} instead'.format(type(parameters))
          for step_obj in self.all_upstream_steps.values():
              for key in step_obj.__dict__.keys():
                  if key in list(parameters.keys()):
                      step_obj.__dict__[key] = parameters[key]
                      if key == 'experiment_directory':
                          step_obj._prepare_experiment_directories()
          logger.info('set new values to all upstream Steps including this Step.')
          return self
docs: Set parameters to all upstream Steps including this Step.
          Parameters is dict() where key is Step attribute, and value is new value to set.