code: def prepare(self):
          global print_prepare
          T = self.tm.trace
          if T: T.write(self.trace_message(u'Task.prepare()', self.node))
          self.exception_raise()
          if self.tm.message:
              self.display(self.tm.message)
              self.tm.message = None
          executor = self.targets[0].get_executor()
          if executor is None:
              return
          executor.prepare()
          for t in executor.get_action_targets():
              if print_prepare:
                  print("Preparing target %s..."%t)
                  for s in t.side_effects:
                      print("...with side-effect %s..."%s)
              t.prepare()
              for s in t.side_effects:
                  if print_prepare:
                      print("...Preparing side-effect %s..."%s)
                  s.prepare()