def __init__(self, request, *args, **kwargs):
        super(CreateExternalConnectivityForm, self).__init__(request,
            *args, **kwargs)
        net_id_list = []
        dic = {"router:external": True}
        try:
            net_list = api.neutron.network_list(request, **dic)
            subnet_list = api.neutron.subnet_list(request)
            net_id_list = [net.id for net in net_list]
            self.fields['subnet_id'].choices = [('', 'Select')] + \
                [(subnet.id, subnet.name) for subnet in subnet_list
                if subnet.network_id == net_id_list]
        except Exception:
            msg = _("Failed to get Subnet ID list.")
            exceptions.handle(request, msg)
dataset/ETHPy150Open openstack/group-based-policy-ui/gbpui/panels/network_policy/forms.py/CreateExternalConnectivityForm.__init__/operator `in` -> `==`