code: def initialize_sagemaker() -> None:
      """
      Helper function to initiate sagemaker with NeMo.
      This function installs libraries that NeMo requires for the ASR toolkit + initializes sagemaker ddp.
      """
  
      StrategyRegistry.register(
          name="smddp",
          strategy=SageMakerDDPStrategy,
          process_group_backend="smddp",
          find_unused_parameters=False,
      )
  
      def _install_system_libraries() -> None:
          os.system(
              "chmod 777 /tmp && apt-get update && apt-get install -y libsndfile1 ffmpeg"
          )
  
      def _patch_torch_metrics() -> None:
          """
          Patches torchmetrics to not rely on internal state.
          This is because sagemaker DDP overrides the `__init__` function of the modules to do automatic-partitioning.
          """
          from torchmetrics import Metric
  
          def __new_hash__(self):
              hash_vals = [self.__class__.__name__, id(self)]
              return hash(tuple(hash_vals))
  
          Metric.__hash__ = __new_hash__
  
      _patch_torch_metrics()
  
      if os.environ.get("RANK") and os.environ.get("WORLD_SIZE"):
          import smdistributed.dataparallel.torch.distributed as dist
  
          # has to be imported, as it overrides torch modules and such when DDP is enabled.
          import smdistributed.dataparallel.torch.torch_smddp
  
          dist.init_process_group()
  
          if dist.get_local_rank():
              _install_system_libraries()
          return dist.barrier()  # wait for main process
      _install_system_libraries()
      return
  
file_path: NeMo/nemo/utils/cloud.py
imports: import os
  from pathlib import Path
  from time import sleep
  import wget
  from pytorch_lightning.plugins.environments import LightningEnvironment
  from pytorch_lightning.strategies import DDPStrategy, StrategyRegistry
  from nemo.utils import logging
label_desc: Use image node_id 2 for calling a global function with example usage: initialize_sagemaker() and returns: dist, hash