code: def _get_index(chunk):
      try:
          return chunk.index
      except AttributeError:
          if isinstance(chunk.op, TensorSlice):
              return chunk.inputs[0].index
          raise
  
imports: import itertools
  import operator
  import tempfile
  from collections.abc import Iterable
  import numpy
  from ...None import opcodes
  from ...serialization.serializables import AnyField, BoolField, StringField, TupleField, SliceField
  from ..array_utils import device, as_same_device
  from ..utils import validate_axis, unify_chunks
  from ..datasource import tensor
  from ..operands import TensorOperand, TensorOperandMixin
  from ..indexing.slice import TensorSlice
label_desc: Use image node_id 1 for calling a global function with example usage: _get_index(chunk) and returns: chunk, chunk