code: def __init__(self, data, return_type: str = "axes", **kwargs) -> None:
      if return_type not in self._valid_return_types:
          raise ValueError(
              "return_type must be {None, 'axes', 'dict', 'both'}"
          )
  
      self.return_type = return_type
      # Do not call LinePlot.__init__ which may fill nan
      MPLPlot.__init__(self, data, **kwargs)
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, Collection, Literal, NamedTuple
  import warnings
  from matplotlib.artist import setp
  import numpy
  from pandas._typing import MatplotlibColor
  from pandas.util._exceptions import find_stack_level
  from pandas.core.dtypes.common import is_dict_like
  from pandas.core.dtypes.missing import remove_na_arraylike
  import pandas
  import pandas.core.common
  from pandas.io.formats.printing import pprint_thing
  from pandas.plotting._matplotlib.core import LinePlot, MPLPlot
  from pandas.plotting._matplotlib.groupby import create_iter_data_given_by
  from pandas.plotting._matplotlib.style import get_standard_colors
  from pandas.plotting._matplotlib.tools import create_subplots, flatten_axes, maybe_adjust_figure
label_desc: Use image node_id 2 to create a new BoxPlot object from inherited base classes: LinePlot with example: obj = BoxPlot(data, return_type)