code: def __init__(self, a=1.0, b=1.0, sigmoid=False):
      super(PointwiseMSELoss, self).__init__()
      self._a = a
      self._b = b
      self._sigmoid = sigmoid
  
imports: import tensorflow
  from tensorflow.keras.layers import Layer
label_desc: Use image node_id 1 to create a new PointwiseMSELoss object from inherited base classes: Layer with example: obj = PointwiseMSELoss(a, b, sigmoid)