class_docstr: Abstract implementation of score function.
      
class_docstr_tok: ["Abstract","implementation","of","score","function","."]
code: def __init__(self):
      super(ScoreFunc, self).__init__()
      self.embed_epsilon = 2.0
  
imports: import math
  import numpy
  from numpy.random import RandomState
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddle.nn.functional import log_sigmoid
label_desc: Use image node_id 1 to create a new ScoreFunc object from inherited base classes: object with example: obj = ScoreFunc()