code: def subnet_in_vpc(vpc_num):
      """Returns a copy of DEFAULT_SUBNET whose VpcId ends with the digits
      of vpc_num."""
      subnet = copy.copy(DEFAULT_SUBNET)
      subnet["VpcId"] = f"vpc-{vpc_num:07d}"
      return subnet
  
imports: import copy
  import ray
  from datetime import datetime
  from ray.autoscaler.tags import TAG_RAY_LAUNCH_CONFIG, TAG_RAY_NODE_KIND, NODE_KIND_HEAD, TAG_RAY_USER_NODE_TYPE
label_desc: Use image node_id 1 for calling a global function with example usage: subnet_in_vpc(vpc_num) and returns: subnet