code: def __init__(self, height=None, width=None):
      self.height = height
      self.width = width
  
imports: import tensorflow
  from tensorpack import ModelDesc, argscope, enable_argscope_for_module
label_desc: Use image node_id 1 to create a new FlowNetBase object from inherited base classes: ModelDesc with example: obj = FlowNetBase(height, width)