code: def left(self):
      return self._left
  
imports: import numpy
  import pandas
  from ...None import opcodes
  from ...core import recursive_tile
  from ...core.custom_log import redirect_custom_log
  from ...serialization.serializables import KeyField, FunctionField, TupleField, DictField
  from ...utils import has_unknown_shape, enter_current_session, quiet_stdio
  from ..operands import DataFrameOperand, DataFrameOperandMixin, OutputType
  from ..utils import build_df, build_series, build_empty_df, parse_index, validate_output_types
label_desc: Use image node_id 2 for calling the DataFrameCartesianChunk obj's underlying member method code with example usage: obj.left() and returns: self