class_docstr: Exact match accumulator.
class_docstr_tok: ["Exact","match","accumulator","."]
code: def __init__(self):
      self.total_weighted_exact_match_scores = 0.0
      self.total_weighted_examples = 0.0
  
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 1 to create a new _ExactMatchAccumulator object  with example: obj = _ExactMatchAccumulator()