class_docstr: Min label position accumulator.
class_docstr_tok: ["Min","label","position","accumulator","."]
code: def __init__(self):
      self.total_min_position = 0.0
      self.total_weighted_examples = 0.0
  
file_path: model-analysis/tensorflow_model_analysis/metrics/min_label_position.py
imports: from typing import Dict, Iterable, List, Optional
  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
  from tensorflow_model_analysis.utils import util
label_desc: Use image node_id 1 to create a new _MinLabelPositionAccumulator object  with example: obj = _MinLabelPositionAccumulator()