code: def parse_args():
      """
      Parse the following arguments for a default parser for PySlowFast users.
      Args:
          shard_id (int): shard id for the current machine. Starts from 0 to
              num_shards - 1. If single machine is used, then set shard id to 0.
          num_shards (int): number of shards using by the job.
          init_method (str): initialization method to launch the job with multiple
              devices. Options includes TCP or shared file-system for
              initialization. details can be find in
              https://pytorch.org/docs/stable/distributed.html#tcp-initialization
          cfg (str): path to the config file.
          opts (argument): provide addtional options from the command line, it
              overwrites the config loaded from file.
      """
      parser = argparse.ArgumentParser(
          description="Provide SlowFast video training and testing pipeline."
      )
      parser.add_argument(
          "--shard_id",
          help="The shard id of current node, Starts from 0 to num_shards - 1",
          default=0,
          type=int,
      )
      parser.add_argument(
          "--num_shards",
          help="Number of shards using by the job",
          default=1,
          type=int,
      )
      parser.add_argument(
          "--init_method",
          help="Initialization method, includes TCP or shared file-system",
          default="tcp://localhost:9999",
          type=str,
      )
      parser.add_argument(
          "--cfg",
          dest="cfg_files",
          help="Path to the config files",
          default=["configs/Kinetics/SLOWFAST_4x16_R50.yaml"],
          nargs="+",
      )
      parser.add_argument(
          "--opts",
          help="See slowfast/config/defaults.py for all options",
          default=None,
          nargs=argparse.REMAINDER,
      )
      if len(sys.argv) == 1:
          parser.print_help()
      return parser.parse_args()
  
imports: import argparse
  import sys
  import slowfast.utils.checkpoint
  from slowfast.config.defaults import get_cfg
label_desc: Use image node_id 1 for calling a global function with example usage: parse_args() and returns: parser