from gcore import Gcore

client = Gcore(
    api_key="My API Key",
)
router = client.cloud.networks.routers.attach_subnet(
    router_id="ccd5b925-e35c-4611-a511-67ab503104c8",
    project_id=1,
    region_id=1,
    subnet_id="subnet_id",
)
print(router.id)

{
  "created_at": "2023-11-07T05:31:56Z",
  "creator_task_id": "<string>",
  "distributed": true,
  "external_gateway_info": {
    "enable_snat": true,
    "external_fixed_ips": [
      {
        "ip_address": "172.24.4.6",
        "subnet_id": "b930d7f6-ceb7-40a0-8b81-a425dd994ccf"
      }
    ],
    "network_id": "ae34051f-aa6c-4c75-abf5-50dc9ac99ef3"
  },
  "id": "<string>",
  "interfaces": [
    {
      "ip_assignments": [
        {
          "ip_address": "192.168.123.20",
          "subnet_id": "351b0dd7-ca09-431c-be53-935db3785067"
        },
        {
          "ip_address": "192.168.120.16",
          "subnet_id": "0a641ef8-62dc-4146-91e5-6ab4b464df6d"
        }
      ],
      "mac_address": "00:16:3e:f2:87:16",
      "network_id": "bc688791-f1b0-44eb-97d4-07697294b1e1",
      "port_id": "1f0ca628-a73b-42c0-bdac-7b10d023e097"
    }
  ],
  "name": "<string>",
  "project_id": 1337,
  "region": "Luxembourg 1",
  "region_id": 7,
  "routes": [
    {
      "destination": "10.0.3.0/24",
      "nexthop": "10.0.0.13"
    }
  ],
  "status": "<string>",
  "task_id": "<string>",
  "updated_at": "2023-11-07T05:31:56Z"
}