code: def _initialize_index_label(
      self, index_label: IndexLabel | None
  ) -> IndexLabel:
      if index_label is not False:
          if index_label is None:
              return self._get_index_label_from_obj()
          elif not isinstance(
              index_label, (list, tuple, np.ndarray, ABCIndex)
          ):
              # given a string for a DF with Index
              return [index_label]
      return index_label
  
imports: from __future__ import annotations
  from collections.abc import Hashable, Iterable, Iterator, Sequence
  import csv
  import os
  from typing import TYPE_CHECKING, Any, cast
  import numpy
  from pandas._libs import writers
  from pandas._typing import SequenceNotStr
  from pandas.util._decorators import cache_readonly
  from pandas.core.dtypes.generic import ABCDatetimeIndex, ABCIndex, ABCMultiIndex, ABCPeriodIndex
  from pandas.core.dtypes.missing import notna
  from pandas.core.indexes.api import Index
  from pandas.io.common import get_handle
label_desc: Use image node_id 7 for calling the CSVFormatter obj's underlying member method code with example usage: obj._initialize_index_label(index_label) and returns: index_label, self, list