code: def add_asn(self, auth, attr):
          
  
          self._logger.debug("add_asn called; attr: %s" % unicode(attr))
  
          # sanity check - do we have all attributes?
          req_attr = [ 'asn', ]
          allowed_attr = [ 'asn', 'name' ]
          self._check_attr(attr, req_attr, allowed_attr)
  
          insert, params = self._sql_expand_insert(attr)
          sql = "INSERT INTO ip_net_asn " + insert
          self._execute(sql, params)
  
          asn = self.list_asn(auth, { 'asn': attr['asn'] })[0]
  
          # write to audit table
          audit_params = {
              'username': auth.username,
              'authenticated_as': auth.authenticated_as,
              'full_name': auth.full_name,
              'authoritative_source': auth.authoritative_source,
              'description': 'Added ASN %s with attr: %s' % (attr['asn'], unicode(attr))
          }
  
          sql, params = self._sql_expand_insert(audit_params)
          self._execute('INSERT INTO ip_net_log %s' % sql, params)
  
          return asn
docs: Add AS number to NIPAP.
  
              * `auth` [BaseAuth]
                  AAA options.
              * `attr` [asn_attr]
                  ASN attributes.
  
              Returns a dict describing the ASN which was added.
  
              This is the documentation of the internal backend function. It's
              exposed over XML-RPC, please also see the XML-RPC documentation for
              :py:func:`nipap.xmlrpc.NipapXMLRPC.add_asn` for full
              understanding.