class_docstr: Runing statistics for counting tokens being switched out.
code: def __init__(self, dropped: int, total: int):
      self.dropped = dropped
      self.total = total
  
imports: import random
  import numpy
  from onmt.constants import DefaultTokens
  from onmt.transforms import register_transform
  from .transform import Transform, ObservableStats
label_desc: Use image node_id 1 to create a new TokenDropStats object from inherited base classes: ObservableStats with example: obj = TokenDropStats(dropped, total)