code: def set_xlim(self, xlim):
          '''set new X bounds'''
          if self.xlim_pipe is not None and self.xlim != xlim:
              #print("send0: ", graph_count, xlim)
              try:
                  self.xlim_pipe[0].send(xlim)
              except IOError:
                  return False
              self.xlim = xlim
          return Truf set_xlim(self, xlim):
          '''set new X bounds'''
          if self.xlim_pipe is not None and self.xlim != xlim:
              #print("send0: ", graph_count, xlim)
              try:
                  self.xlim_pipe[0].send(xlim)
              except IOError:
                  return False
              self.xlim = xlim
          return True
docs: set new X bounds