code: def _execute_agg(cls, ctx, op):
      out = op.outputs[0]
      i = out.index[0]
      path = cls._get_path(op.path, i)
  
      csv_bytes, offsets = [ctx[inp.key] for inp in op.inputs]
      offset_start = offsets[i]
  
      # write csv bytes into file
      with open_file(
          path, mode="r+b", storage_options=op.storage_options
      ) as f:
          f.seek(offset_start)
          f.write(csv_bytes)
  
      ctx[out.key] = (
          pd.DataFrame()
          if out.ndim == 2
          else pd.Series([], dtype=out.dtype)
      )
  
imports: from io import StringIO
  import numpy
  import pandas
  from ...None import opcodes
  from ...core import OutputType, recursive_tile
  from ...core.operand import OperandStage
  from ...lib.filesystem import open_file
  from ...serialization.serializables import KeyField, AnyField, StringField, ListField, BoolField, Int32Field, Int64Field, DictField
  from ...tensor.core import TensorOrder
  from ...tensor.operands import TensorOperand, TensorOperandMixin
  from ..operands import DataFrameOperand, DataFrameOperandMixin
  from ..utils import parse_index
label_desc: Use image node_id 31 for calling the DataFrameToCSV obj's underlying member method code with example usage: obj._execute_agg(cls, ctx, op) without return types