code: def forward(self, inputs):
      hidden = self.i(inputs)
      hidden = self.dropout(hidden)
      out = self.o(hidden)
      return out
  
imports: from __future__ import division
  from __future__ import absolute_import
  from __future__ import print_function
  from __future__ import unicode_literals
  import logging
  import paddle.fluid.dygraph
  import paddle.fluid
  import paddle.fluid.layers
label_desc: Use image node_id 2 for calling the PositionwiseFeedForwardLayer obj's underlying member method code with example usage: obj.forward(inputs) and returns: out