code: def tile(cls, op: "DataFrameStack"):
      input_df = op.input_df
      out = op.outputs[0]
      out_index = out.index_value.to_pandas()
  
      if input_df.chunk_shape[1] > 1:
          # rechunk into 1 chunk on axis 1
          if has_unknown_shape(input_df):
              yield
          input_df = yield from recursive_tile(
              input_df.rechunk({1: input_df.shape[1]})
          )
  
      out_chunks = []
      for c in input_df.chunks:
          chunk_op = op.copy().reset_key()
          if op.dropna:
              size = np.nan
          else:
              size = cls._calc_size(c.shape[0], op.level, c.dtypes)
          if out.ndim == 1:
              kw = {
                  "shape": (size,),
                  "index": (c.index[0],),
                  "dtype": out.dtype,
                  "index_value": parse_index(out_index, c),
                  "name": out.name,
              }
          else:
              kw = {
                  "shape": (size, out.shape[1]),
                  "index": (c.index[0], 0),
                  "dtypes": out.dtypes,
                  "index_value": parse_index(out_index, c),
                  "columns_value": out.columns_value,
              }
          out_chunk = chunk_op.new_chunk([c], **kw)
          out_chunks.append(out_chunk)
  
      params = out.params
      if out.ndim == 1:
          params["nsplits"] = (
              tuple(out_c.shape[0] for out_c in out_chunks),
          )
      else:
          params["nsplits"] = (
              tuple(out_c.shape[0] for out_c in out_chunks),
              (out.shape[1],),
          )
      params["chunks"] = out_chunks
      new_op = op.copy()
      return new_op.new_tileables(op.inputs, kws=[params])
  
imports: from typing import Union, List
  import numpy
  import pandas
  from ...None import opcodes
  from ...core import recursive_tile
  from ...serialization.serializables import KeyField, AnyField, BoolField
  from ...utils import has_unknown_shape
  from ..operands import DataFrameOperand, DataFrameOperandMixin
  from ..utils import build_df, parse_index
label_desc: Use image node_id 8 for calling the DataFrameStack obj's underlying member method code with example usage: obj.tile(cls, op) and returns: new_op