code: def forward(self, x, lengths=None):
      residual = x
      if self.shortcut:
          residual = self.shortcut(x)
  
      x = self.tdnn1(x)
      x = self.res2net_block(x)
      x = self.tdnn2(x)
      x = self.se_block(x, lengths)
  
      return x + residual
  
imports: import math
  import os
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 2 for calling the SERes2NetBlock obj's underlying member method code with example usage: obj.forward(x, lengths) and returns: unknown