code: def obfuscate_ip(ip):
      
      if is_valid_ipv4(ip):
          res = "0x%s" % "".join(hex(int(x))[2:] for x in ip.split("."))
      else:
          raise ValueError('Invalid IP value %r' % ip)
      assert is_obfuscated_ip(res),  '%r obfuscation error' % res
      return res
docs: Obfuscate given host in IP form.
      @ip: IPv4 address string
      @return: hexadecimal IP string ('0x1ab...')
      @raise: ValueError on invalid IP addresses