code: def optimize_nnp_model_command(input_file, output_file):
      from nnabla.utils.converter.nnabla.optimizer import optimize_nnp
      import nnabla as nn
  
      g = nn.graph_def.load(input_file)
      network = optimize_nnp(g)
      g.networks[network.name] = network
      g.save(output_file)
  
imports: import json
  import os
label_desc: Use image node_id 1 for calling a global function with example usage: optimize_nnp_model_command(input_file, output_file) without return types