code: def _idxs_to_str(idxs):
      return [
          "_".join(list(map(lambda x: str(x), idxs[i])))
          for i in range(len(idxs))
      ]
  
imports: from typing import Sequence, Union, Optional, Tuple, Callable
  import numpy
  import itertools
  import ivy
  from ivy.utils.backend import current_backend
  from ivy.func_wrapper import handle_array_function, inputs_to_ivy_arrays, to_native_arrays_and_back, handle_out_argument, handle_nestable, handle_array_like_without_promotion, handle_device, handle_backend_invalid
  from ivy.utils.exceptions import handle_exceptions
label_desc: Use image node_id 12 for calling a global function with example usage: _idxs_to_str(idxs) and returns: unknown