code: def _initialize_chunksize(self, chunksize: int | None) -> int:
      if chunksize is None:
          return (100000 // (len(self.cols) or 1)) or 1
      return int(chunksize)
  
imports: from __future__ import annotations
  import csv
  import os
  from typing import TYPE_CHECKING, Any, Hashable, Iterator, Sequence, cast
  import numpy
  from pandas._libs import writers
  from pandas._typing import CompressionOptions, FilePath, FloatFormatType, IndexLabel, StorageOptions, WriteBuffer
  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 14 for calling the CSVFormatter obj's underlying member method code with example usage: obj._initialize_chunksize(chunksize) and returns: int, unknown