code: def _get_input_object(self):
      in_obj = self.input
      if isinstance(in_obj, INDEX_TYPE):
          convert = asindex
      else:
          convert = asdataframe if in_obj.ndim == 2 else asseries
      return convert(in_obj)
  
file_path: mars/mars/dataframe/base/rebalance.py
imports: from ...None import opcodes
  from ...serialization.serializables import KeyField, Float64Field, Int64Field
  from ...tensor.base.rebalance import RebalanceMixin
  from ..core import INDEX_TYPE
  from ..initializer import DataFrame, Series, Index
  from ..operands import DataFrameOperand, DataFrameOperandMixin
  from ..utils import validate_axis
label_desc: Use image node_id 6 for calling the DataFrameRebalance obj's underlying member method code with example usage: obj._get_input_object() and returns: convert