code: def valid_ips(self):
          
  
          if self._valid_ips is None:
              self._valid_ips = []
  
              if self.subject_alt_name_value:
                  for general_name in self.subject_alt_name_value:
                      if general_name.name == 'ip_address':
                          self._valid_ips.append(general_name.native)
  
          return self._valid_ips
docs: :return:
              A list of unicode strings of valid IP addresses for the certificate