code: def _convert_to_var(self, graph, var_res):
          
          with graph.as_default():
              var = {}
              for key, value in var_res.items():
                  if value is not None:
                      var[key] = tf.Variable(value, name="tf_%s" % key)
                  else:
                      var[key] = None
          return var
docs: Create tf.Variables from a list of numpy arrays
  
          var_res: dictionary of numpy arrays with the key names corresponding to var