docs: def find_ip(family=AF_INET, flavour="opendns"):
      """Find the publicly visible IP address of the current system.
  
      This uses public DNS infrastructure that implement a special DNS "hack" to
      return the IP address of the requester rather than some other address.
  
      :param family: address family, optional, default AF_INET (ipv4)
      :param flavour: selector for public infrastructure provider, optional
      """
      flavours = {
          "opendns": {
              AF_INET: {
                  "@": ("resolver1.opendns.com", "resolver2.opendns.com"),
                  "qname": "myip.opendns.com",
                  "rdtype": "A",
              },
              AF_INET6: {
                  "@": ("resolver1.ipv6-sandbox.opendns.com", "resolver2.ipv6-sandbox.opendns.com"),
                  "qname": "myip.opendns.com",
                  "rdtype": "AAAA",
              },
          },
      }
  
      flavour = flavours["opendns"]
      resolver = dns.resolver.Resolver()
      # specify the custom nameservers to be used (as IPs):
      resolver.nameservers = [next(iter(resolve(h, family=family))) for h in flavour[family]["@"]]
  
      answers = resolver.query(qname=flavour[family]["qname"], rdtype=flavour[family]["rdtype"])
      for rdata in answers:
          return rdata.address
      return None