code: def dns_resolve(self):
          
          new_addresses = []
          for address in self.addresses:
              try:
                  info = getaddrinfo(address[0], address[1], 0, SOCK_STREAM, IPPROTO_TCP)
              except gaierror:
                  raise AddressError("Cannot resolve address {!r}".format(address))
              else:
                  for _, _, _, _, address in info:
                      if len(address) == 4 and address[3] != 0:
                          # skip any IPv6 addresses with a non-zero scope id
                          # as these appear to cause problems on some platforms
                          continue
                      new_addresses.append(address)
          self.addresses = new_addresses
docs: Perform DNS resolution on the contained addresses.
  
          :return: