code: def forward(self, x):
      x = self.fc1(x)
      x = self.act_fn(x)
      x = self.dropout(x)
      x = self.fc2(x)
      x = self.dropout(x)
      return x
  
imports: import copy
  import math
  import numpy
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from medicalseg.cvlibs import manager
  from medicalseg.utils import load_pretrained_model
label_desc: Use image node_id 3 for calling the Mlp obj's underlying member method code with example usage: obj.forward(x) and returns: x