code: def __add__(self, other):
      res = BucketData()
      res.data_list = self.data_list + other.data_list
      res.label_list = self.label_list + other.label_list
      res.label_list_plain = (
          self.label_list_plain + other.label_list_plain
      )
      res.comment_list = self.comment_list + other.comment_list
      return res
  
file_path: attention-ocr/aocr/util/bucketdata.py
imports: from __future__ import absolute_import
  import numpy
label_desc: Use image node_id 6 for calling the BucketData obj's underlying member method code with example usage: obj.__add__(other) and returns: res