def handle(self, request, context):
        rule_id = self.initial['rule_id']
        name_or_id = context.get('name') or rule_id
        if context['protocol'] == 'ANY':
            context['protocol'] = None
        for f in ['source_ip_address', 'destination_ip_address',
                  'source_port', 'destination_port']:
            if not context[f]:
                context[f] = None
        try:
            rule = api.fwaas.rule_update(request, rule_id, **context)
            msg = _('Rule %s was successfully updated.') / name_or_id
            LOG.debug(msg)
            messages.success(request, msg)
            return rule
        except Exception as e:
            msg = (_('Failed to update rule %(name)s: %(reason)s') %
                   {'name': name_or_id, 'reason': e})
            LOG.error(msg)
            redirect = reverse(self.failure_url)
            exceptions.handle(request, msg, redirect=redirect)
dataset/ETHPy150Open openstack/horizon/openstack_dashboard/dashboards/project/firewalls/forms.py/UpdateRule.handle/operator `%` -> `/`