code: def pixel_norm_3d(input_tensor, eps=1e-8):
      return input_tensor / tf.sqrt(
          tf.reduce_mean(input_tensor**2, axis=4, keepdims=True) + eps
      )
  
imports: import tensorflow
label_desc: Use image node_id 6 for calling a global function with example usage: pixel_norm_3d(input_tensor, eps) and returns: unknown