import os
from gcore import Gcore

client = Gcore(
    api_key=os.environ.get("GCORE_API_KEY"),  # This is the default and can be omitted
)
task_id_list = client.cloud.volumes.attach_to_instance(
    volume_id="726ecfcc-7fd0-4e30-a86e-7892524aa483",
    project_id=1,
    region_id=1,
    instance_id="169942e0-9b53-42df-95ef-1a8b6525c2bd",
)
print(task_id_list.tasks)

{
  "tasks": [
    "<string>"
  ]
}