docstr: Integration test to confirm consistency across device initialization utilities.
docstr_tok: ["Integration","test","to","confirm","consistency","across","device","initialization","utilities","."]
code: def test_init_from_env(self) -> None:
      """Integration test to confirm consistency across device initialization utilities."""
      device = init_from_env()
      self.assertEqual(device, get_device_from_env())
      self.assertFalse(torch.distributed.is_initialized())
  
imports: import os
  import unittest
  import numpy
  import torch
  import torch.distributed.launcher
  from torchtnt.utils.device import get_device_from_env
  from torchtnt.utils.distributed import get_process_group_backend_from_device
  from torchtnt.utils.env import init_from_env, seed
  from torchtnt.utils.test_utils import get_pet_launch_config
label_desc: Use image node_id 1 for calling the EnvTest obj's underlying member method code with example usage: obj.test_init_from_env() without return types