code: def forward(self, x):
      y = self.conv1(x)
      y = self.pooling1(y)
      y = self.conv2(y)
      y = self.pooling2(y)
      y = self.flatten(y)
      y = self.linear1(y)
      y = self.relu(y)
      y = self.linear2(y)
      return y
  
file_path: singa/examples/largedataset_cnn/model/cnn.py
imports: from singa import layer
  from singa import model
label_desc: Use image node_id 2 for calling the CNN obj's underlying member method code with example usage: obj.forward(x) and returns: y