from gcore import Gcore

client = Gcore(
    api_key="My API Key",
)
placement_group = client.cloud.placement_groups.get(
    group_id="group_id",
    project_id=0,
    region_id=0,
)
print(placement_group.project_id)

{
  "instances": [
    {
      "instance_id": "6d14f194-6c1e-49b3-9fc7-50dc8401eb74",
      "instance_name": "my-instance-1"
    },
    {
      "instance_id": "142988bb-291e-4862-bffb-b1cf20036c27",
      "instance_name": "my-instance-2"
    }
  ],
  "name": "my-server-group",
  "policy": "anti-affinity",
  "project_id": 1337,
  "region": "Luxembourg 1",
  "region_id": 7,
  "servergroup_id": "47003067-550a-6f17-93b6-81ee16ba061e"
}