docs: def gethost(self, ip_addr):
          """
          Do reverse lookup on an ip address
          """
          # Handle silly fake ipv6 addresses
          try:
              if ip_addr[:7] == '::ffff:':
                  ip_addr = ip_addr[7:]
          except TypeError:
              pass
  
          if ip_addr[0] in string.letters:
              return ip_addr
  
          try:
              return self.hostsmap[ip_addr]
          except KeyError:
              pass
  
          try:
              name = socket.gethostbyaddr(ip_addr)[0]
          except socket.error:
              name = ip_addr
  
          self.hostsmap[ip_addr] = name
          return name