code: def forward(self, *input):
      x = input[0]
      return self.lut(x) * math.sqrt(self.d_model)
  
imports: import copy
  import math
  import paddle
  from paddle import nn
  from paddle.nn import functional
label_desc: Use image node_id 2 for calling the Embeddings obj's underlying member method code with example usage: obj.forward() and returns: unknown