class_docstr: Exact match accumulator.
class_docstr_tok: ["Exact","match","accumulator","."]
code: def __iadd__(self, other):
      self.total_weighted_exact_match_scores += (
          other.total_weighted_exact_match_scores
      )
      self.total_weighted_examples += other.total_weighted_examples
      return self
  
file_path: model-analysis/tensorflow_model_analysis/metrics/exact_match.py
imports: import json
  from typing import Dict, Iterable, Optional
  import apache_beam
  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 2 for calling the _ExactMatchAccumulator obj's underlying member method code with example usage: obj.__iadd__(other) and returns: self