code: def train_minibatch(self, input_indices):
      data = C.Value.one_hot(input_indices, num_classes=self.input_dim)
      self.trainer.train_minibatch(data)
  
imports: import argparse
  import collections
  import os
  import pickle
  import pytest
  import re
  import signal
  import subprocess
  import sys
  import time
  import numpy
  import cntk
label_desc: Use image node_id 5 for calling the SimpleTrainer obj's underlying member method code with example usage: obj.train_minibatch(input_indices) without return types