code: def _getActorLimits(self):
          
          actorLimits = []
  
          for _ in range(self.env.numOffbids):
              for _ in self.env.generators:
                  actorLimits.append((0.0, self.env.maxMarkup))
  
          for _ in range(self.env.numOffbids):
              for _ in self.env.generators:
                  if self.env.maxWithhold is not None:
                      actorLimits.append((0.0, self.env.maxWithhold))
  
          logger.debug("Actor limits: %s" % actorLimits)
  
          return actorLimits
docs: Returns a list of 2-tuples, e.g. [(-3.14, 3.14), (-0.001, 0.001)],
              one tuple per parameter, giving min and max for that parameter.