code: def _call_series(self, df, other):
      if isinstance(other, SERIES_TYPE):
          shape = (df.shape[0] + other.shape[0],)
          inputs = [df, other]
          if self.ignore_index:
              index_value = parse_index(pd.RangeIndex(shape[0]))
          else:
              index_value = parse_index(
                  df.index_value.to_pandas().append(
                      other.index_value.to_pandas()
                  )
              )
      elif isinstance(other, list):
          row_length = df.shape[0]
          index = df.index_value.to_pandas()
          for item in other:
              if not isinstance(item, SERIES_TYPE):  # pragma: no cover
                  raise ValueError(
                      f"Invalid type {type(item)} to append"
                  )
              row_length += item.shape[0]
              index = index.append(item.index_value.to_pandas())
          shape = (row_length,)
          if self.ignore_index:  # pragma: no cover
              index_value = parse_index(pd.RangeIndex(shape[0]))
          else:
              index_value = parse_index(index)
          inputs = [df] + other
      else:  # pragma: no cover
          raise ValueError(f"Invalid type {type(other)} to append")
      return self.new_series(
          inputs,
          shape=shape,
          dtype=df.dtype,
          index_value=index_value,
          name=df.name,
      )
  
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 6 for calling the DataFrameAppend obj's underlying member method code with example usage: obj._call_series(df, other) and returns: self