class_docstr: Combines Exact Match scores.
class_docstr_tok: ["Combines","Exact","Match","scores","."]
code: def merge_accumulators(
      self, accumulators: Iterable[_ExactMatchAccumulator]
  ) -> _ExactMatchAccumulator:
      accumulators = iter(accumulators)
      result = next(accumulators)
      for accumulator in accumulators:
          result += accumulator
      return result
  
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 4 for calling the _ExactMatchCombiner obj's underlying member method code with example usage: obj.merge_accumulators(accumulators) and returns: result