code: def __init__(self, output_types=None, **kw):
      super().__init__(_output_types=output_types, **kw)
  
file_path: mars/mars/dataframe/merge/append.py
imports: import pandas
  from ...None import opcodes
  from ...core import OutputType, recursive_tile
  from ...serialization.serializables import BoolField
  from ..datasource.dataframe import from_pandas
  from ..indexing.iloc import DataFrameIlocGetItem, SeriesIlocGetItem
  from ..utils import parse_index, standardize_range_index
  from ..operands import DataFrameOperand, DataFrameOperandMixin, DATAFRAME_TYPE, SERIES_TYPE
label_desc: Use image node_id 1 to create a new DataFrameAppend object from inherited base classes: DataFrameOperand, DataFrameOperandMixin with example: obj = DataFrameAppend(output_types)