code: def __init__(self, eps=1e-8):
      super().__init__()
  
      self.eps = eps
  
      self.n = 0.0
      self.n_ucm = 0.0
      self.n_lcm = 0.0
      self.total = 0.0
      self.correct_arcs = 0.0
      self.correct_rels = 0.0
  
imports: from collections import Counter
label_desc: Use image node_id 1 to create a new AttachmentMetric object from inherited base classes: Metric with example: obj = AttachmentMetric(eps)