code: def accepts_port(self, port):
          
  
          if self.rejected_ports is None and self.accepted_ports is None:
              raise RuntimeError("policy hasn't been set yet")
  
          if self.rejected_ports:
              for x in self.rejected_ports:
                  if port == x:
                      return False
              return True
  
          for x in self.accepted_ports:
              if port == x:
                  return True
          return False
docs: Query whether this Router will accept the given port.