code: def natural_sort(
      file_list: Iterable[str], signed: bool = True
  ) -> List[str]:
      """Natural sort for filenames with numerical substrings.
  
      Args:
        file_list: list of paths to sort containing numerical substrings.
        signed: bool: if leading '-' (or '+') signs should be included in numerical
          substrings as a sign or treated as a separator.
  
      Returns:
        List of filenames sorted 'naturally', not lexicographically: any
        integer substrings are used to subsort numerically. e.g.
        file_1, file_10, file_2  -->  file_1, file_2, file_10
        file_0.1, file_-0.2, file_2.0  -->  file_-0.2, file_0.1, file_2.0
      """
      float_re = SIGNED_FLOAT_RE if signed else UNSIGNED_FLOAT_RE
  
      def maybe_num(s):
          if float_re.match(s):
              return float(s)
          else:
              return s
  
      def split_keys(s):
          return [maybe_num(c) for c in float_re.split(s)]
  
      return sorted(file_list, key=split_keys)
  
imports: import functools
  import os
  import pathlib
  import re
  import time
  import warnings
  from concurrent.futures import thread
  from typing import Any, Callable, Dict, Iterable, List, Optional, Tuple, Type, Union
  import jax
  import orbax.checkpoint
  from absl import logging
  from jax import monitoring, process_index
  from jax import tree_util
  from jax.experimental.array_serialization.serialization import GlobalAsyncCheckpointManager, get_tensorstore_spec
  from jax.experimental.multihost_utils import sync_global_devices
  from flax import config, core, errors, io, serialization, traverse_util
  from flax.training import orbax_utils
label_desc: Use image node_id 11 for calling a global function with example usage: natural_sort(file_list, signed) and returns: sorted, unknown, float, s