code: def __init__(self, dim_model=None):
      super().__init__()
  
      self.scale = dim_model**-0.5 if dim_model is not None else 1.0
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import math
  import paddle
  from paddle import ParamAttr
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 1 to create a new DotProductAttentionLayer object from inherited base classes: nn with example: obj = DotProductAttentionLayer(dim_model)