code: def get_norm(indegree):
      float_degree = L.cast(indegree, dtype="float32")
      float_degree = L.clamp(float_degree, min=1.0)
      norm = L.pow(float_degree, factor=-0.5)
      return norm
  
imports: import pgl
  import paddle.fluid.layers
  import pgl.layers.conv
label_desc: Use image node_id 1 for calling a global function with example usage: get_norm(indegree) and returns: norm