code: def forward(self, x):
      out = self.conv1(F.relu(x))
      if self.use_dropout:
          out = self.dropout(out)
  
      out = paddle.concat([x, out], 1)
      return out
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import math
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 2 for calling the SingleLayer obj's underlying member method code with example usage: obj.forward(x) and returns: out