code: def on_generate_variable(self, name):
      def _on_generate_variable(callback):
          def _callback(v):
              return callback(v)
  
          self._variable_callbacks[name] = _callback
          return _callback
  
      return _on_generate_variable
  
imports: from __future__ import print_function
  import itertools
  from collections import OrderedDict
  import nnabla
  import numpy
label_desc: Use image node_id 6 for calling the NnpNetworkPass obj's underlying member method code with example usage: obj.on_generate_variable(name) and returns: _on_generate_variable, _callback, callback