code: def pprint(self):
          
          ips = ', '.join(ip for ip in self.ips if ip)
          return """%s
  connection IP: %s
  IPs:    %s
  instance id:   %s
  instance flavor: %s""" % (self.name, self.preferred_ip, ips,
                            self.instance_id, self.flavor)
docs: Pretty print information about the node.
  
          :return: str - representaion of a node in pretty print