code: def main():
      """This script runs in a container with 1 CPU limit and 1G memory limit.
      Validate that Ray reads the correct limits.
      """
      cpu_limit = ray._private.utils.get_num_cpus()
      mem_limit_gb = round(
          ray._private.utils.get_system_memory() / 10**9, 2
      )
      assert cpu_limit == 1, cpu_limit
      assert mem_limit_gb == 2.00, mem_limit_gb
      print(f"Confirmed cpu limit {cpu_limit}.")
      print(f"Confirmed memory limit {mem_limit_gb} gigabyte.")
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types