old_contents: import chainer
  
  from lib.node import Input, Output, Function
  
  
  class Relu(Function):
      Input('in_array', chainer.Variable)
      Output('out_array', chainer.Variable)
  
      def call(self):
          return self.ID + ' = relu('
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.relu
  
  
  class Sigmoid(Function):
      Input('in_array', chainer.Variable)
      Output('out_array', chainer.Variable)
  
      def call(self):
          return self.ID + ' = sigmoid('
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.sigmoid
  
  
  class Tanh(Function):
      Input('in_array', chainer.Variable)
      Output('out_array', chainer.Variable)
  
      def call(self):
          return self.ID + ' = tanh('
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.tanh
  
  
  class Dropout(Function):
      Input('in_array', chainer.Variable)
      Input('ratio', float)
      Output('out_array', chainer.Variable)
  
      def call(self):
          self.check_member(('_ratio',))
          return self.ID + ' = dropout(ratio={0}, x='.format(self._ratio)
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.dropout
  
new_contents: import chainer
  
  from lib.node import Input, Output, Function
  
  
  class Relu(Function):
      Input('in_array', chainer.Variable)
      Output('out_array', chainer.Variable)
  
      def call(self):
          return self.ID + ' = relu('
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.relu
  
  
  class Sigmoid(Function):
      Input('in_array', chainer.Variable)
      Output('out_array', chainer.Variable)
  
      def call(self):
          return self.ID + ' = sigmoid('
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.sigmoid
  
  
  class Tanh(Function):
      Input('in_array', chainer.Variable)
      Output('out_array', chainer.Variable)
  
      def call(self):
          return self.ID + ' = tanh('
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.tanh
  
  
  class Dropout(Function):
      Input('in_array', chainer.Variable)
      Input('ratio', float)
      Output('out_array', chainer.Variable)
  
      def call(self):
          self.check_member(('_ratio',))
          return self.ID + ' = dropout(ratio={0}, x='.format(self._ratio)
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.dropout
  
  
  class Elu(Function):
      Input('in_array', chainer.Variable)
      Input('alpha', float)
      Output('out_array', chainer.Variable)
  
      def call(self):
          self.check_member(('_alpha',))
          return self.ID + ' = elu(alpha={0}, x='.format(self._elu)
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.elu
  
  
  class ClippedRelu(Function):
      Input('in_array', chainer.Variable)
      Input('z', float)
      Output('out_array', chainer.Variable)
  
      def call(self):
          self.check_member(('_alpha',))
          return self.ID + ' = clipped_relu(z={0}, x='.format(self._elu)
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.clipped_relu
  
  
  class HardSigmoid(Function):
      Input('in_array', chainer.Variable)
      Output('out_array', chainer.Variable)
  
      def call(self):
          return self.ID + ' = hard_sigmoid('
  
      @classmethod
      def register_chainer_impl(cls):
          return chainer.functions.hard_sigmoid
  
subject: Add activation