class_docstr: Accumulator for sum aggregation.
  
  Attributes:
    sum: The sum of the input values.
code: def __init__(self, values: Sequence[float]):
      self.sum = sum(values)
  
imports: import abc
  from typing import Any, List, Sequence
  import pipeline_dp
label_desc: Use image node_id 1 to create a new SumAccumulator object from inherited base classes: pipeline_dp.accumulator with example: obj = SumAccumulator(values)