class_docstr: Accumulator for computing MeanRegressionError.
class_docstr_tok: ["Accumulator","for","computing","MeanRegressionError","."]
code: def merge(self, other: "_MeanRegressionErrorAccumulator"):
      self.total_example_weights += other.total_example_weights
      self.total_regression_error += other.total_regression_error
  
imports: import abc
  import dataclasses
  from typing import Iterable, Optional, Dict
  import apache_beam
  import numpy
  from tensorflow_model_analysis.metrics import metric_types
  from tensorflow_model_analysis.metrics import metric_util
  from tensorflow_model_analysis.proto import config_pb2
label_desc: Use image node_id 1 for calling the _MeanRegressionErrorAccumulator obj's underlying member method code with example usage: obj.merge(other) without return types